PC Virus Woes (HALP! :S )

Right, so earlier today, I *ahem* Downloaded a Keygen for UltraMon (The multiple monitor software).

However it contained a Trojan that installed a Bogus Spyware scanner (lol irony) onto my system.
It was called ContraViro.

And it also killed my Windows Security Center, disabled everything.

After googling it on my old mans PC, I found a program to remove the offending program (It tried charging for an 'uninstall key' if I tried to uninstall it using old-fashioned methods).

Now, it's all gone and destroyed.
However my Windows Security Center is still strawberry floated up.
I can't start the Firewall, Spyware scanner or anything.

If I Click the Red Shield in my taskbar and press "Turn on" it comes up with an error message that states:

"The Security Center Service can't be started

Windows Defender can't open, stating the error:

Error Found: Code 0x80070422.

So... uh wtf mon.

I've not got alot of stuff on this hard drive, so Formatting is an easy option if I can't be arsed faffing around with this.

did you look up the error code and try this ?

I'd say format it and start over just to make sure you got all of the virus out.

Why are you posting here? We might catch it now!