Kaspersky is a free online anti-virus program which is used to detect and report all types of malware, spyware, viruses, and you need not install it or uninstall the existing antivirus software on your PC. The online scan executes on Windows operating systems XP, Vista, and Seven RC. The web browsers required for the scan are Internet Explorer 6, Firefox and Opera. You can have a security check as to what kind of viruses are getting through your system and ascertain if your antivirus is effectively eliminating them or not. Internet connection is necessary for this online scan. Kaspersky Lab uses Microsoft ActiveX technology for functioning online as Microsoft ActiveX Technology works well on Internet Explorer 6.The Kaspersky scanning service does not reach the boot sectors and MBRs, so finding malware code inside these is not possible.
If you're using IE, you will be asked to download an Active X control. Do so.
Note: It may be necessary to disable the your anti-virus to avoid potential conflicts. You should avoid downloading files and surfing the internet during this time as your machine is temporarily unprotected.
Once the scan is complete, remember to reactivate your anti-virus.
Allow the program to download and update.
After that, the scanner is ready
Under "Analyze" click on "My Computer" to do a full system scan
The scan will begin
Once the scan is complete, the result is displayed
Click on "Save Report" to make a backup of it
Save the report so as to be easily found (on the desktop for example)