Don't bother searching. Hit control alt delete and look at Processes. If MSBlast is in the list, you have this virus. Download the appropriate patch and install it. Then delete the MSBlast in your Processes list. Next go to Start in the bottom left hand corner. Go to Run. Type in regedit and hit ok. Look in the folder "HKEY_LOCAL_MACHINE", then "Software", "Microsoft", "Windows", "CurrentVersion" and finally "Run". In a list of stuff to the right, look for a line containing MSBlast. You might have to expand certain columns to see everything. Delete the line with MSBlast in it here too, and restart your computer. You should be all set. When downloading the patch, I recommend saving to disk instead of opening. Why? Because this virus gives you a very small window of opportunity to fix the problem before restarting. If you save the file, you'll have just enough time to finish saving it before it kicks you off. Then you can install the patch on your next computer restart.