BitDefender QuickScan is a handy online utility that quickly scans your computer for threats such as viruses, rootkits and keyloggers.
Despite the fact that the BitDefender QuickScan website states that the service doesn't require any software, that's not entirely true. The first time you use it, you'll need to install an add-on or extension and restart the browser, depending on which one you're using.
Once installed and you've agreed to the user agreement, BitDefender QuickScan will scan your computer. This is very quick, keeps to the background and won't interfere with anti-viruses already installed. Crucially, it won't slow down your computer either.
Once it has finished, BitDefender QuickScan will tell you if it has found an infection or not and gives you the option to see a report. If it does find a problem, BitDefender QuickScan won't actually cure it - it just alerts you so you can then take the appropriate action.
While in no way is BitDefender QuickScan replacement for antivirus software, it is a useful security tool to have on hand.