There's a new computer virus going around called, Conflicker (a.k.a. "Downadup" or W32.Downadup") that is perhaps one of the most dangerous computer viruses ever created. This computer virus is a malicious worm, meaning it replicates itself and causes harm to PC's and networks.
Like most computer viruses, one of the first things it does is turn off automatic updates (for Windows and Antivirus software). It also deletes previous restore points and prevents PC's from accessing certain security sites. Once it has the computer pretty much disabled so that it can't remove this virus, it then configures the PC to connect to the malicious virus server so that it can receive further malicious programs and wreck havoc from there.
This worm is hyped to be far more serious than any other to date and as such is something to pay close attention to. Make sure all Windows Updates are performed and that you have a good AntiVirus software program installed and that it's up to date.
If you do get the Conlficker Worm (or W32.Downadup Worm), Norton has a special tool you can use to remove it. To get Norton's removal tool for W32.Downadup Worm, click here.
For more information about the Conficker worm, click here.