This is a fast online virus scan provided by BitDefender - the scan takes a few minutes only. It works in Internet Explorer, Mozilla Firefox and Google Chrome on Windows XP, Vista, 7, 8 and 8.1. You need to launch Internet Explorer with administrative rights in Windows Vista and later.
For Internet Explorer, an ActiveX control needs to be installed.
For Mozilla Firefox, an add-on needs to be installed and Firefox must be restarted after installation. Open this web page again to run the scan.
For Google Chrome, an extension needs to be installed and you must then refresh/reload this web page.
Windows Vista, 7 and 8/8.1 users must launch Internet Explorer with administrative (elevated) rights to install BitDefender QuickScan ActiveX control.
To do that in Windows Vista and 7, open Start menu by pressing Windows Key on your keyboard or by clicking Start button. Type "internet" into Search box and right-click Internet Explorer in search results. Click Run as administator.
In Windows 8 and 8.1, go to Desktop using keyboard shortcut Windows Key+D. Then right-click Internet Explorer icon on Taskbar, right-click Internet Explorer in the menu and then click Run as administrator. Alternatively, open Start screen, type a part of "internet explorer", right-click the result and choose Run as administrator.
BitDefender Quickscan checks active processes (running programs) on your computer and detects viruses and malware in them. It will not remove any of the possibly infected items, it's just a quick indication whether your computer is clean or not. So this is not a replacement for an anti-virus or anti-malware program!
You can see my recommendations on free anti-virus programs and free anti-malware programs.
Note: an offer to buy some BitDefender product always appears after scanning completes. You do not have to buy anything if you do not want to.
Steps to take if infected files were found
If your Windows XP, Vista or 7 computer is not clean, you can install a free anti-virus program, for example avast! Free Antivirus or Microsoft Security Essentials and perform full scans. Just remember not to install more than one anti-virus program, as this will make your computer really slow.
Next, scan your computer with free Malwarebytes Anti-Malware to make really-really sure your computer is clean of all kinds of malware. This applies to all Windows versions.
To prevent further infections, use free WOT Safe Surfing Tool and Trusteer Rapport for keeping away from malicious and phishing sites; and use Secunia Personal Software Inspector to keep your programs up-to-date and secured.