Virus or malware are the biggest threat today for business users as well as for home users. Once your system get infected it get very hard to install or run anything in the system. To overcome this situation we require portable virus scanner or offline virus scanner to scan the system. A badly infected PC may also not have access to internet, So in this situation a portable offline virus scanner can play an important role.

Offline Virus Scanners

We are providing some good Free offline portable tools which can help to get rid of a virus infected PC. All these tools are stand alone (portable) virus scanners. So you can easily run them from the USB stick. Below comparison table can help you to instantly review all the tools.

ProductDownload SizeCommand Line
Emsisoft Emergency Kit233 MBYes
ClamWin Portable9 MBNo
eScan Antivirus Toolkit147 MBNo
Microsoft Safety Scanner146 MBNo
Vipre Rescue279 MBYes


If you are unable to boot up the windows properly. Check out Best Bootable Antivirus Software to Rescue infected computer. A virus infected device is also very vulnerable to Ransommare. Please also check Best Antiransomware software to avoid ransomware attacks. After scanning with these offline virus scanner we also recommend you to scan with a cloud based Anti Malware Software.

Portable virus removal tools

Below are the best Free portable virus removal tools or offline scanners.  All these tools can be run through USB stick. Some of these tools also provide command line support to run them through DOS. These are useful when your severe infected PC denied to run any executable file.

1. Emsisoft Emergency Kit

Emsisoft Emergency kit Download

Download Emsisoft Emergency Kit – Size – 233 MB

It is a collection of portable software which includes powerful Malware scanner, HijackFree and BlitzBank in its Pro version. But in Free version you get a Powerful Malware Scanner to eliminate most of the deep threats. This can be run through a USB stick. Emsisoft emergency kit supports both GUI and Command line. It is available for free download for personal use but you can also purchase a pre-compiled USB stick for the commercial use. It is ideal to rescue from a badly infected PC.

2. ClamWin Portable

ClamWin Free and Open Source Offline Scanner

Download ClamWin Portable – Size – 9 MB

It is free and open source Antivirus. And it have a good detection rate. You can use it offline from a USB stick. Clamwin team updates its virus database regularly. it provides a Graphical user interface and have the option to choose the folder or file to scan. It does not provide command line interface.

3. eScan Antivirus toolkit

eScan Antivirus Toolkit

Download eScan Antivirus Toolkit – Size – 147 MB

It is also a portable standalone virus scanner. You can use it from USB drive CD without any installation. It can detect and remove virus, malware, spyware from the system. Its database is being updated every day to catch the latest possible threats. No command line option is there in this tool but you can choose the drive or folder to scan.

4. Microsoft Safety Scanner

Download microsoft Safety Scanner

Download Microsoft Safety Scanner – Size – 146 MB

Microsoft Safety scanner is an on demand scanner to remove virus, spyware, malware and malicious software from the windows PC. It get expired automatically after 10 days of download to bring up the tool with the latest virus definition. It has 3 scan options.

5. Vipre Rescue

Vipre Rescue Command Line Offline Scanner

Download Vipre Rescue  – Size – 279 MB

Vipre Rescue is an easy and handy virus scanner tool. If windows is unstable and do not allow to install any software, then this tool is very effective. There is no cnfiguration option in it. No choice of selecting folder or drive. Just run and stay relaxed while it scan the system. This tool only supports command line. For the complete instruction go to

After scanning with these tools, probably you will be able to connect to the internet. Now scan with an Online Virus Scanner or a Second opinion scanner.  As a result it will clean the system more deeply for any type of latest malware.

In the end we recommend everyone to install a good paid Antivirus software in the system. If you are unable to afford a paid antivirus, then free antivirus software can do good. Install a free antivirus with real time protection along with a Free Antimalware Software.

Still some people take this very lightly and does nothing to protect their computer. Computer ignored with minor infection can become severe, which is hard to clean. furthermore an infected computer can give way to enter serious ransomware. It can end up with data loss or money loss.


Q: Does we require internet connection to run USB antivirus?

A: These USB antivirus can be run via USB without an internet connection. So internet connection is not required.

Q: Do we require to install anything in the computer to run these virus scanners?

A: No portable software do not require any installation. They named as portable because they can be run directly from without installing anything. These are very useful when infected pc blocks to install anything in the pc.

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