Sophos Virus Removal Tool is an on-demand free virus scanning tool for Windows that scans for viruses in the file system and memory.
Every time the program is started, it automatically begins an update to be sure it’s definitions are current, which is nice.
You won’t find custom settings inÂ Sophos Virus Removal ToolÂ like file/folder exclusions, scheduled scanning, or context menu integration like similar products offer. However, the scan is thorough and the program lets you remove any viruses it finds when it’s finished, whichÂ is still helpful.
The program isÂ 80 MB in size, so the download may take some time to complete.
Trend Micro HouseCall is a portable, lightweight on-demand virus scanner for Windows. It finds and eliminates Trojans, viruses, worms, and spyware.
The program automatically updates when when you open it so as to stay current with recent releases and definition updates.
You can run a quick scan, full scan, or custom scan to select specific folders.
Trend Micro HouseCall is completely portable andÂ just over 2 MB in size, making it ideal to place on a portable drive.
Kaspersky has a free on-demand virus scanner called Kaspersky Virus Removal Tool.
The program can scanÂ system memory, hidden startup objects, boot sectors, archives, and entire disk drives with an option to select specific location like external drives.
There are also settings that can makeÂ the tool scan certain file types only and skip files that are taking too long to scan.
Kaspersky Virus Removal Tool can be used in Windows 7, Vista, and XP as a portable program that doesn’t require installation.
Norman Malware Cleaner is an on-demand virus scanner for Windows that’s portable and free to use.
Normal Malware Cleaner can scan inside archives,Â search for fake antivirus software, identify rootkits, and detect malicious items running in system memory. There’s also aÂ ForensicsÂ section to scan running files to find anything that look suspicious and could possibly be malicious.
Options are available to exclude files and folders from a scan and to deleteÂ or restore quarantined itemsÂ that Normal Malware Cleaner has found.
The download size of Norman Malware Cleaner is 300 MB. This is a large size file, yes, but that’s because the program isn’t installed to your computer, but instead runs as a portable program.
When you need to update Norman Malware Cleaner, you must download the setup file again, which is very unfortunate considering its size.
15.Â Rizone Virus Cleaner
Rizone Virus Cleaner is a portable on-demand free virus scanner that finds viruses in runningÂ processes and the file system.
The program runs without installation, so it’s perfect for a USB device. Just select the drive that should be scanned and then clickÂ Go!Â to begin.
Rizone Virus Cleaner doesn’t have many of the advanced options you find in some of the other on-demand cleaners in this list, but it’s simple to use and doesn’t require installation.
16.Â VIPRE Rescue
VIPRE Rescue is an on-demand free virus scanner. It doesn’t have a user interface, but instead runs through aÂ command prompt.
After downloading VIPRE Rescue, you must extract the files to a folder and run the file calledÂ VipreRescueScanner.exe. A scan will immediately start and it will automatically remove any viruses it finds.
Note:Â I recommend only using this program if every other scanner in this list fails to install due to a virus infection. There aren’t advanced options and it’s too easy to accidentally stop the scan by exiting the command prompt window.
17.Â Panda Cloud Cleaner
The developers ofÂ Panda Cloud Antivirus FreeÂ also haveÂ an on-demand tool for Windows that can scan for viruses, called Panda Cloud Cleaner.
This program scans in the registry, system memory, and other common locations where malware could be hiding. You can also scan individual files and folders, shut down all running processes, unlock files, and submit suspicious filesÂ to Panda for analysis.
If a PC is infected in a way that it’s being blocked from running EXE program files, you can choose to download theÂ portable Panda Cloud CleanerÂ and run the included VBS file to bypass the executable restriction. This is very handy if you need to scan for viruses but can’t open any program.
18.Â Zillya! Scanner
Zillya! Scanner is a free on-demand portable virus scanner for Windows.
You can run a quick scan to find viruses in sensitive folders, a full scan to scan every area of a drive, or a custom scan to choose particular folders, files, and drives to scan.
When running a custom scan, you can choose to just check potentially dangerous file types for viruses instead of having Zillya! Scanner scan every single file.
F-Secure Online Scanner is another free on-demand virus scanner. This program doesn’t scan every location on a PC, but instead looks through folders where viruses aren’t normally found. If F-Secure finds a virus, it’s removed without question and doesn’t prompt you to decide to keep it.
The software is entirely portable and only takes a minute to download.