If you've ever run into the ad that takes over your internet browser and pretends to be a virus scan, you know how annoying that can be. Well, prepare to be even more annoyed, because it has been tweeked a bit. Now, it puts an auto-loading executable into your temp folder. By the time you realize it's there, you already have a rootkit hiding somewhere.
I ran into this the other night, and thought I had it taken care of right away. Instead, in the process of trying to get rid of it my system restore files were trashed and eventually many of my system tools weren't functioning properly.
If you suddenly find a new symbol in your taskbar, manually shutdown your computer (don't let it save settings) and restart it in safemode. Once safemode is loaded, purge the temp folder and run an antivirus that actually detects and removes rootkits.
I am having to reinstall my OS for the 5th time since I first got this computer (thumbsdown)