Online Virus Scanners run inside the web browser to scan and detect threats that are active on your hard drive at the moment you scan it. They are designed to detect and eliminate any malicious code that has got into your computer. However, it does not permanently protect your computer. After running Online Scanner, you should make sure that you have an up-to-date security solution keeping your computer free of problems in the future.

Free Online Virus Scanner List:

Panda Nanoscan – a light-weight virus scanner that scans your computer for viruses, spyware, trojans and other threats in a minute only. It also allows you to scan your PC right from your personalized homepages such as NetVibes , iGoogle or PageFlakes. NanoScan is a tool for detecting malware, but not for removing.

Updates: NanoScan services discontinued

Panda ActiveScan 2.0 – A combination of ActiveScan 1.0, NanoScan & TotalScan into a one-stop cleanup tool that not just detecting and disinfecting all types of malware in your computer hard drive, but also seeks out these threats in e-mail and compressed files.

Trend Micro HouseCall – An online virus scanner that’s absolutely free and scans your PC hard drive for a wide range of Internet security threats including viruses, worms, Trojans, and spyware. HouseCall allows you to remove detected infections and fixes vulnerabilities to help prevent re-infection. Works with Firefox and IE. Requires Java.

McAfee Freescan – A free virus scanner from McAfee , based on the McAfee VirusScan engine that helps you detect thousands of viruses on your computer. Should viruses be found, FreeScan prepares a list of infected files and links to information about the viruses on your computer and what you can do to clean your system. Requires Microsoft Internet Explorer 5.0 or later with ActiveX to scan your computer.

ESET Online Scanner – A free Web-based service that allows users to scan and disinfect malware, such as viruses, worms, Trojans, phishing and spyware from your systems, hard disks, compressed files and email. ESET Online Scanner uses the same ThreatSense technology and signatures as ESET Smart Security/ESET NOD32 Antivirus. The current release adds the same anti-stealth technology used in ESET Smart Security and ESET NOD32 Antivirus to protect against threats such as rootkits.

Windows Live OneCare Safety Scanner – A free Web-based antivirus online scanner service that gives you PC health and security scans to help you diagnose and solve problems, but it does not proactively protect your PC against new virus infections. It is part of Windows OneCare.

Symantec Security Scan – An online virus scanner from the developers of Norton Antivirus 2007 can detect most virus threat but there is no option to delete the virus infected file or repair it. Does not examine compressed files. Requires IE with ActiveX.

BitDefender Online Scanner – An on-demand antivirus and antispyware tool based on BitDefender scanning engines. BitDefender Online Scanner will scan and automatically clean your system’s memory, all files, folders and drives’ boot sectors. Requires QuickScan add ons download and install on your computer.

If your computer is acting up and you suspect foul play, visit to one of the free online virus scanner above to confirm your suspicions. ActiveX controls are programs based on Microsoft’s architecture for running applications through the Internet Explorer web browser.You must download and install a plug-in or ActiveX control for them to work.

If you know other online virus scanner should included on the above list, let us know your suggestion on comment sections.