greyback

My desktop PC has been infected with the My Security Engine virus. Bloody nightmare. Basically, in case you ever come across it, the thing throws loads of fake trojan horse threats against your system and changes your host files. The main problem is it causes a bunch of processes to run in the background so it stops you from getting rid of it. If you do get it go here for advice on getting shot of it:

http://www.bleepingcomputer.com/virus-removal/remove-my-security-engine