So, I ran scans with Microsoft Security Essentials
Installing multiple AV programs on a computer will result in all kind of mysterious windows errors an false positive detections

Here is why

Never install two antivirus (see reply from quietman7)
http://www.bleepingcomputer.com/forums/index.php?s=7c8217673a726b92cfc91ecfd4294a29&showtopic=260844&view=findpost&p=1441638

so start with uninstalling one