Updated: June 4, 2019 Home » Computer and Internet Security » Free Portable USB Antivirus
Is something not quite right with your computer even when you have an antivirus installed? Are you being plagued by pop-up windows trying to get you to download security software or alerts claiming your PC isn’t secure? It appears like your antivirus could have been compromised, therefore a portable antivirus that works alongside your existing antivirus can provide a second opinion.
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If your Microsoft Windows is infected by malware, chances are, your antivirus has been disabled by the virus or trojan. Uninstalling and reinstalling any antivirus is useless because the malware is programmed to disable it. This is where portable USB antivirus comes to the rescue. Two heads is better than one, having a second opinion from a different security software is better than none. Without further ado, here are the complete list of the best portable anti-virus scanner that can be used without installation to scan and clean infected computers
Avast Free Mac Security uses a traditional signature-based method to scan files on your Mac for known malware, Trojans, and viruses. Avast can root out rootkits and other methods that a hacker uses to gain control and is able to pry open compressed files to scan their content. Avast Free Antivirus for Mac One of the most feature-rich free Mac Antivirus applications, AVG for Mac packs in almost all the features you can expect from the Windows version into a nice clean interface on the Mac. 10 Best Mac OS X Anti-Spyware and Anti-Virus Software for Free. Kaspersky seems to have one of the best on the market right now but I personally prefer Avira or Avast for rescue disks as Kaspersky has issues on USB. Geckoandfly grew from strength to strength to be one of the many popular blogs around the world. It started out as a.
Pro & Con of Portable Antivirus
Portable standalone antivirus needs to be updated regularly; some antivirus allows you to download the database, while other requires you to download the entire software. Some standalone antivirus are not updated frequently, thus it might not be able to detect the latest malware. Here are the complete list of all portable antivirus, they are compatible with fully featured antivirus.
↓ 01 – Microsoft Safety Scanner
Do you think your PC has a virus? The Microsoft Safety Scanner is a free downloadable security tool that provides on-demand scanning and helps remove viruses, spyware, and other malicious software. It works with your existing antivirus software. Microsoft Safety Scanner expires 10 days after downloading. To re-run a scan with the latest anti-malware definitions, please download and run Microsoft Safety Scanner again.
This tool does not replace your antimalware product. For real-time protection with automatic updates, use Windows Defender Antivirus on Windows 10 and Windows 8 or Microsoft Security Essentials on Windows 7. These antimalware products also provide powerful malware removal capabilities.
↓ 02 – Avira PC Cleaner
Avira PC Cleaner is a malware scanner that works alongside other anti-malware products. It protects PCs, laptops and netbooks running Windows XP (SP3) and above. Best of all, PC Cleaner doesn’t require installation, registration or any additional drivers. On-demand scanners are often called second-opinion scanners, as they may be run next to any installed antivirus solution.
The main idea is to verify that resident security software is working correctly and that no malicious software slipped by it. While running on-demand scanners is no guarantee that the system is indeed clean, it increases the likelihood that it is.
↓ 03 – Intel McAfee GetSusp
McAfee GetSusp is intended for users who suspect undetected malware on their computer. GetSusp eliminates the need for deep technical knowledge of computer systems to isolate undetected malware. It does this by using a combination of heuristics and querying the McAfee Global Threat Intelligence (GTI) File Reputation database to gather suspicious files.
↓ 04 – Intel McAfee Stinger
McAfee Stinger is a standalone utility used to detect and remove specific viruses. It is not a substitute for full anti-virus protection, but a specialized tool to assist administrators and users when dealing with infected system. Details on new or enhanced signatures added with each Stinger build are listed in the Readme details.
Stinger now includes Real Protect – a real-time behavior detection technology that monitors suspicious activity on an endpoint. Real Protect leverages machine learning and automated behavioral based classification in the cloud to detect zero-day malware in real-time.
↓ 05 – Intel McAfee Security Scan Plus
McAfee Security Scan Plus is a free diagnostic tool that ensures you are protected by actively checking your computer for up-to-date anti-virus, firewall, and web security software. Security Scan Plus scans for threats such as malware, Trojans, and unwanted programs actively running on your computer. It even scans your browser history for suspicious activity.
When a scan is complete, a report provides details on the presence and status of your security protection. If problems are detected, Security Scan Plus provides security recommendations. Security Scan Plus automatically scans your computer on a weekly basis to ensure your antivirus software, firewall protection, and web security are active and up to date.
↓ 06 – Intel McAfee RootkitRemover
McAfee RootkitRemover is a stand-alone utility used to detect and remove complex rootkits and associated malware. Currently it can detect and remove ZeroAccess, Necurs and TDSS family of rootkits. McAfee Labs plans to add coverage for more rootkit families in future versions of the tool.
↓ 07 – Comodo Cleaning Essentials
Comodo Cleaning Essentials (CCE) is a set of computer security tools designed to help users identify and remove malware and unsafe processes from infected computers. Designed as a portable application, the software requires no installation and can be run directly from removable media such as a USB key. CCE consists of two core technologies:
Fully featured malware scanner capable of unearthing and removing viruses, rootkits, hidden files and malicious registry keys hidden deep within a system. The scanner is highly configurable, uses the latest heuristic techniques to detect previously unknown viruses, features first-class malware removal capabilities and is capable of detecting hidden drivers and services loaded during system start-up.
- Instantly identify and stop every untrusted process running on an endpoint with a single click
- Powerful antivirus scanner capable of removing malware, rootkits, hidden files and malicious registry keys hidden deep within a system
- Forensic level stats and graphs allow internal processes and resource usage to be analyzed with unrivaled granularity
- Integration with Comodo cloud scanners provides real-time safety verdicts for unknown processes
- Perfect for ensuring network endpoints are totally clean of threats
- No installation required – can run direct from USB or user desktop via RDP
↓ 08 – Kaspersky Virus Removal Tool
They’ve changed the way this software runs now, it is not portable anymore but still perform the scan as usual. Checks for known malware and software vulnerabilities on your PC – plus advises you on your PC’s security status with the free Kaspersky Virus Removal Tool. Kaspersky Virus Removal Tool uses Kaspersky Lab’s latest technologies – plus real-time access to cloud-based security information – to ensure it can scan your PC for the latest viruses and emerging threats.
A very simple quick scan for viruses and malware, during the download of Kaspersky Virus Removal Tool, there will be a download of Kaspersky Security Scan installation files, as well as Kaspersky Software Updater which is an integral part of Kaspersky Virus Removal Tool. Get FREE & quick help for your PC – download an efficient tool to clean up your computer from viruses, Trojans, malware, adware and more.
↓ 09 – Kaspersky TDSSKiller
A rootkit for Windows systems is a program that penetrates into the system and intercepts the system functions ( Windows API ). It can effectively hide its presence by intercepting and modifying low-level API functions. Moreover it can hide the presence of particular processes, folders, files and registry keys. Some rootkits install its own drivers and services in the system (they also remain “invisible”). Remember, TDSSKiller is not a substitute for anti-virus or Internet security software protection. To keep your computer and devices secure, you should install Internet security software.
↓ 10 – Symantec Norton Power Eraser
Eliminates deeply embedded and difficult to remove crimeware that traditional virus scanning doesn’t always detect. Norton Power Eraser is a free tool that can be downloaded and run to remove threats from your computer. You can run this tool to scan for threats even if you have a Symantec product, or any other security product. If you cannot start the computer in Normal mode, you can run this tool in Safe mode. Norton Power Eraser is easy to download, and scans your computer quickly to detect the most aggressive computer viruses. You don’t need to install this tool.
The Norton Power Eraser tool is compatible with computers running Microsoft Windows operating systems only. It does not work with computers running on Mac OS X. Norton Power Eraser uses aggressive methods to detect threats, and there is a risk that it can select some legitimate programs for removal. You should carefully review the scan results page before removing files.
↓ 11 – Symantec Norton Security Scan
The power and speed of Norton scan technology, available to you for FREE. Scans your computer and lets you know if viruses or malwares are present.
Use Norton Security Scan to determine if your system has been infected with viruses, malware, spyware, or other threats. Newly added — the Cookie Manager that you can use to check for suspicious or dangerous cookies and remove those that raise a concern.
↓ 12 – Dr.Web CureIt!
Run Dr.Web CureIt!® (no need to install it) is Russian antivirus that quickly scan your computer and cure it of any malicious objects. Dr.Web CureIt! is an indispensable tool for curing computers running MS Windows 8/7/Vista/XP/Server 2003/2008/2012 (32- and 64-bit systems). Dr.Web CureIt! detects and neutralizes viruses, rootkits, Trojan horses, spyware, and other malicious objects that have gone undetected by your anti-virus software.
The Dr.Web CureIt! utility will cure an infected system once, but it is not designed to provide your PC with real-time protection from viruses. The utility available on our website always features the latest virus definitions, but its virus databases aren’t updated automatically. Included in Dr.Web CureIt! is a set of virus databases that are only current until a new update is released (usually one or more times per hour).
↓ 13 – Zemana AntiMalware Portable | 14 Days Free Trial
Clean your computer in minutes, no matter how badly infected! Zemana AntiMalware Free makes it possible! Zamana AntiMalware is an excellent choice to have installed on your computer, because of the low resource consumption you can use the program daily to make sure your not infected with any malicious files, and because of the ease to use interface the program is avaiable to every computer user and not only expert.
- Advanced Malware Detection and Removal
- Browser Cleanup
- Effective Against Rootkits and Bootkits
↓ 14 – Emsisoft Emergency Kit
The Emsisoft Emergency Kit contains a collection of programs that can be used without software installation to scan for malware and clean infected computers: Emsisoft Emergency Kit Scanner and Emsisoft Commandline Scanner. The Emsisoft Emergency Kit Scanner includes the powerful Emsisoft Scanner complete with graphical user interface. Scan the infected PC for Viruses, Trojans, Spyware, Adware, Worms, Dialers, Keyloggers and other malicious programs.
↓ 15 – Sophos’s HitmanPro | 30 Days Free Trial
HitmanPro is only 12 MB and requires no installation. It can start directly from a desktop, USB Flash Drive, CD/DVD, or a remote storage device. Even if your antivirus is being manipulated by malware or ransomware is getting a hold of your files, HitmanPro functions normally, detecting and removing the threat.
Besides the free version of Mac antivirus, there is also a premium one called Avast Security Pro for Mac. Avast for Mac Key Features & Benefits • Award-winning antivirus engine with 100% detection rate (according to and AV-Comparatives) • Real-time protection with 3 layers (File System Shield, Mail Shield, Web Shield) • Automatic streaming updates of the virus definitions • Excellent performance – very low on system resources • Simple and intuitive user interface • Completely for free – no registration required Avast for Mac Free Download & Installation Avast for Mac is unfortunately not available on iTunes or App Store. https://luckyfuture.netlify.app/avast-for-mac.html. Avast Security for Mac 2018 Avast Security Pro for Mac – Is it worthy to pay extra? This helps you to keep hackers/ neighbors out of your network. The pro version offers two extra features • Wi-Fi Alerts – This feature will immediately notify you if someone connects to your Wi-Fi network.
HitmanPro has the ability to remove persistent threats from within your operating system and replaces infected Windows resources with safe, original versions, all while proactively blocking reinfection attempts. A new host of malware is activated every day and can be found everywhere, even on trusted websites, evading regular antivirus programs. HitmanPro is designed to run alongside your antivirus, using its behavioral deep scanning to find and eliminate zero-day, next-gen malware that has avoided detection.
↓ 16 – ESET Free Online Scanner
Detect and remove malware on your PC with a powerful and user-friendly tool that uses the same ThreatSense® scanning technology and signatures as ESET Smart Security and ESET NOD32 Antivirus — just by using your web browser. One-time scan to remove malware and threats from your computer for FREE.
- Smart way to test your antivirus – Easy-to-use tool that can run alongside any existing antivirus
- Comprehensive malware detection – Find and remove viruses, Trojans, spyware, phishing and other internet threats
- FREE and easy-to-use tool – No commitment, no registration and completely free one-time scan
- Periodic scanning of your device – Regular and automatic monthly check for infections and suspicious applications
↓ 17 – TrendMicro HouseCall
HouseCall is Trend Micro’s highly popular on-demand antivirus software scanner for identifying and removing viruses, trojans, worms, unwanted browser plugins, and other malicious software. HouseCall Antivirus includes the following features:
- Stand-alone eliminates compatibility issues associated with browser-activated scanners
- Smart Scan delivers the latest antivirus protection while reducing download times
- Enhanced Detection and Cleanup addresses rootkits and other sophisticated threats
- Enhanced Scanning performance speeds threat detection
- Vulnerability scans find threats on other devices connected to your home network
↓ 18 – F-Secure Online Scanner
F‑Secure Online Scanner helps to get rid of viruses and spyware that may cause problems on your PC, and it works even if you have another security software installed on your computer. F‑Secure Online Scanner is easy to use with just a couple of clicks: just download it and run it. It does not leave anything on your PC. Virus worries? Run a scan for free and get rid of malware.
- Find and remove viruses, malware and spyware on your PC
- Easy to use, doesn’t leave anything on your computer
- Works with any other security software installed
- Completely free to run and use
↓ 19 – Panda Cloud Cleaner
Panda Cloud Cleaner is an advanced disinfector based on Collective Intelligence (scanning in-the-cloud) that detects malware that traditional security solutions cannot detect. Disinfect your computer with Panda Cloud Cleaner, they help you keep viruses at bay. Greater detection capacity than traditional antivirus solutions thanks to its latest generation technologies.
Online detection of all types of malware, vulnerabilities and unknown threats. It is easy to use from your browser and always up-to-date against the latest threats. A free report about threats detected and the status of the security protection installed on your computer.
↓ 20 – ClamWin Portable
ClamWin is a Free Antivirus for Microsoft Windows. It provides a graphical user interface to the Clam AntiVirus engine. It features high detection rates for viruses and spyware, regular antivirus updates from the ClamAV team, and a standalone antivirus scanner. ClamWin allows for manually scanning individual files, folder, or drives but does not include an always-on background scanner.
↓ 21 – Sophos Virus Removal Tool
Using cutting edge technology found in our enterprise-grade software, this powerful tool detects all types of malicious software on your computer—including viruses, spyware, rootkits and Conficker—and returns it to a working state.
The tool has direct access to virus data from SophosLabs, our global network of threat researchers, ensuring that even the very latest viruses are detected and removed. And it works alongside your existing antivirus. Their free Virus Removal Tool is a quick and easy way to find and get rid of any threats lurking on your computer. Our tool identifies and cleans up infections your antivirus might have missed.
- Removes viruses, Conficker, rootkits, and fake antivirus
- Supports Windows XP SP2 and up
- Works alongside your existing antivirus
↓ 22 – VIPRE Rescue
VIPRE Rescue is a handy, easy to use tool designed to clean your computer if you are already infected with a virus and your operating system is not working properly as a result of the infection. If you are already running VIPRE and a virus has disabled it, you can still run this program to clean your computer.
↓ 23 – eScan Anti-Virus Toolkit
eScanAV Anti-Virus Toolkit (MWAV) is a FREE utility that enables you to scan and clean Viruses, Spyware, Adware and any other Malware that may have infected your computer. The eScanAV Anti-Virus Toolkit (MWAV) requires no installation and can be run directly from anywhere, on your computer, USB Drive or from a CD ROM. It can also run if you already have other Anti-Virus software installed on your computer.
The eScanAV Anti-Virus Toolkit (MWAV) also gets updated on a daily basis with the latest updates to detect spyware and adware released recently, plus the engine is constantly being improvised for faster and intelligent detections. Free eScan Antivirus Toolkit Download for Windows® 2012 R2 / 2012 / 2008 R2 / 2008 / 2003 R2 / 2003 / 10 / 8.1 / 8 / 7 / Vista / XP. Scan for Viruses, Spyware and Adware in your computer. Just download and run. No installation of this software required.
↓ 24 – Avast aswMBR
aswMBR is the rootkit scanner that scans for MBR/VBR/SRV rootkits. It can detect TDL4/3(Alureon), ZAccess, MBRoot (Sinowal), Whistler, SST, Cidox, Pihar and other malware. The current version of aswMBR uses “Virtualization Technology” to improve detection of stealth malware. Please note that to use this feature your machine & CPU must support hardware virtualization.
↓ 25 – BitDefender Quick Scan [ Discontinued ]
Bitdefender QuickScan uses in-the-cloud scanning technology to detect active malware on your system, in under a minute. Because it focuses on active e-threats, the product uses just a fraction of the system resources needed by a regular virus scan and requires no time-consuming virus signature updates, as the detection process is performed by remote Bitdefender servers.
How To Stop Viruses, Trojan and Malware
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First things first: yes, your Mac needs virus protection. While malware that targets Macs isn't nearly as common as malware that goes after Windows, it does exist and is a growing problem.
Viruses specifically may not yet be the major concern for the Mac but there are many different kinds of malware to worry about: things like trojans, adware, ransomware, spyware, and lots of other dangerous wares so keeping your computer protected is smart.
Our advice? If you're not using an antimalware program for Mac yet, it's time! Below you'll find the 4 best ones we've found, any of which will keep your Mac safe from these growing threats.
If you're here because your Mac is already infected with some form of malware, try using a friend's Mac to create an emergency Mac OS boot device and then use that to download and install one of these antivirus apps to detect and remove the suspected malware.
Not on a Mac? Check out our updated best free Windows antivirus software and best free Android antivirus apps lists.
Avast Free Mac Security
What We Like
Detects several types of malware.
Blocks your computer from sending and receiving viruses in emails.
Able to minimize its impact on system resources.
Includes other security tools.
What We Don't Like
Some features only work in the pro edition.
Might take a while to install.
Avast Free Mac Security uses a traditional signature-based method to scan files on your Mac for known malware, Trojans, and viruses. Avast can root out rootkits and other methods that a hacker uses to gain control and is able to pry open compressed files to scan their content.
Beside malware designed for the Mac, Avast also looks for PC malware to help keep cross-platform infections from occurring. You don’t want to be the person sending off infected email attachments to your PC friends.
Avast uses real-time detection that runs in the background. Avast, like other antivirus apps that continually run in the background, can have an impact on your Mac's performance. Avast, however, gives you the option of using its real-time detection, or a scheduling system that can have less impact on your Mac's performance.
Aug 31, 2006 You are posting a reply to: McAfee vs. Avast Antivirus The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. Which is better mcafee or avast. A Comparison of Avast vs McAfee by the Spyshakers.com Team Editors A custom antivirus comparison of Avast vs McAfee by the Spyshakers.com Team Editors. Avast for Mac 2017 - Free Trial Avast Pro Antivirus 2017 - Free Trial Avast Internet Security 2017 - Free Trial Avast Premier 2017. Both McAfee and Avast got the top honor, which is the “ADVANCED +” award, but McAfee’s impact score (the lower the better) was 7.3, which is considerably better than Avast’s 8.9. So, it’s clear from the independent tests that McAfee is slightly lighter on system resources than Avast, but the latter is not far behind in this race. Avast is a huge computer security giant that controls the lion’s share of the online security market. Its products are compatible with Mac, Windows and Android users and offer both free and upgraded paid antivirus programs for its users. Winner of Round Two: In this battle of McAfee vs Avast, Avast wins hands down, without a doubt.
- Scheduled scans allow you to set the time for Avast for Mac to run its routine scans for the presence of malware. Moving the scheduled time to when it will least impact your workload is a big plus.
- File shield can check all of the files on your Mac for nefarious content. Files can also be checked by file type or location on your Mac.
- Web shield blocks unsafe websites from loading or downloads from those sites from occurring.
- Mail shield prevents dangerous email attachments from downloading or from being executed.
- Local network scan makes sure your home network and all connected devices are free from vulnerabilities that hackers could make use of to steal personal data.
Avast uses real-time detection that runs in the background. Avast, like other antivirus apps that continually run in the background, can have an impact on your Mac's performance. Avast, however, gives you the option of using its real-time detection, or a scheduling system that can have less impact on your Mac's performance.
Bitdefender Antivirus for Mac
What We Like
Avast Free Mac Security Review
Easy to set up and forget about. Free vpn in avast security pro for mac.
Finds malware automatically.
Includes lots of really great features.
Has a lightweight footprint.
What We Don't Like
The free version is limited in several important ways.
Bitdefender offers two security apps for the Mac a free Virus Scanner for Mac and the paid Bitdefender Antivirus for Mac. Both use the same Bitdefender engine for finding and removing malware, but Virus Scanner for Mac uses a manual approach to scanning your Mac, while Bitdefender Antivirus for Mac is loaded with features to make the process simple and, if you want to, as automatic as possible to ensure you are never the victim of a malware attack.
In fact, the Autopilot feature works so well that you can just about turn it on and forget about it, knowing that your Mac is protected from current and future threats from malware as well as ransomware, which is on the upswing in the hacking world.
- Time Machine Protection monitors your Time Machine backups and prevents ransomware attacks that may try to encrypt or remove your backups.
- Safe File allows you to specify folders that will be continuously monitored, preventing unauthorized apps from making changes to these folders.
- Adware removal can free your Mac from annoying ads, unwanted browser add-ons, and browser toolbars that may be added without your consent.
- Traffic Light browser extension works with Safari, Chrome, and Firefox to add advance phishing detection to your browser and warn you of dangerous websites.
Bitdefender makes use of traditional signature-based detection system as well as behavioral-pattern recognition. To help keep its database of devious malware types up to date, Bitdefender uses a cloud-based data collection system that stores the most recently detected Mac malware, adware, and ransomware information, allowing all Bitdefender users to have the latest updated detection system.
Malwarebytes for Mac
What We Like
It's always active and running to find threats.
Provides advanced options that can be tweaked to your desires.
Doesn't use up lots of memory or CPU.
What We Don't Like
The free version only works in manual mode (i.e., it can't catch malware automatically).
Malwarebytes for Mac has been a top choice for finding and removing Mac-based malware ever since its early appearance as Adware Medic.
Now under the guidance of Malwarebytes, the app retains its free ability to find and remove malware but has also expanded its capabilities to offer a premium paid version that can actively prevent Mac virus, spyware, and malware infections. It can also keep adware and unwanted apps from finding a home on your Mac.
- Detects and removes adware targeting Macs without requiring a separate browser add-on.
- Real-time protection can be disabled, allowing you to scan only when you wish.
- Includes an uninstaller for removing the Malwarebytes app.
- Low system overhead even with background scanning enabled.
Malwarebytes uses a signature-based system to determine the presence of Mac malware. The signature list can be updated as often as once per hour. Malware that is discovered can be automatically quarantined for easy removal at a later date.
Avast For Mac 10.7.5
Sophos Home for Mac
What We Like
Provides real-time threat detection.
Identifies and removes various types of malware.
Includes unique features such as remote management.
Protects against web threats via filtering.
What We Don't Like
Several features are not included in the free edition.
Read Thomas Reed's excellent article on the 'myth of the dirty Mac' here -. In that case I would recommend the free utility. Avast cleanup pro review.
You must provide personal details to download the free version.
It has a relatively large setup file.
Sophos has been a leader in business-grade antivirus and security protection apps for PCs and Macs for years. Sophos brings the same business-grade security system to the personal Mac (there is also a PC version) user for free.
Sophos Home for Mac can protect every Mac in your home from malware, viruses, and ransomware. It also can protect your web browsing from stumbling across inappropriate websites that may contain phishing schemes or malware.
Sophos uses signature-based as well as heuristic-based behavioral detection to monitor the unusual behavior of apps to identify suspicious activity. Like most antivirus apps for the Mac, Sophos can detect Windows-based threats as well, helping to prevent cross-platform contamination.
- Remote management allows you to monitor, configure and control Sophos Home on up to ten Macs or PCs.
- Parental controls can block viewing inappropriate websites while keeping a log of such web visit attempts for later review.
- Background scanning had a low impact on overall performance.
- On-demand scanning allows you to initiate a scan at any time.
Lifehacker Avast For Mac Review
Sophos runs primarily in the background scanning your Mac and detecting if malware or related threats are present whenever you download, copy, or open a file or folder. The scanner can also examine compressed files to make sure files contained within are safe.