You may recollect that Avast antivirus had a screensaver which scanned your Windows computer when it got activated. The Security Essentials screen-saver does something similar with Microsoft Security Essentials!
Security Essentials screensaver
If you download and install this Security Essentials screensaver and set it as your default screensaver, to run when your system is idle, it will first perform an update and then run the scan when activated.
Goes without saying that you must have Microsoft Security Essentials installed! Microsoft Security Essentials is a free download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology.
Head over to DeviantArt if you’d like to download and learn more about it.