A virus that shuts me down

Viruses and worms
1

Wake up two days ago, went to the PC only to find it logged off and anti virus shuted down…
Did a restart but the anti virus (NOD 32 at that time) won’t open. And then I got this weird message -

http://img98.imageshack.us/img98/1093/wtfei7.jpg

After a few seconds this end of the world shutdown appeared… telling me I have 60 seconds to save my stuff cuze there’s gonna be a shutdown and then a restart…
Well… It just kept on coming after I restarted and restarted… Went online and read a few stuff about it… Used the shutdown -a thingy which did stop it at first… but now it won’t do it anymore. Called Microsoft and they gave me this antivirus - Avast! which was awesome at first! Deleting tons of viruses I had on my system… I was sure that that virus was gone… My PC was open and online for more then 22 hours straight without no weird message’s… Well… Yesterday’s night it happened again… I keep getting this virus notification from the anti virus -

Sign of "Win32:Warezov-KX[Warm]" has been found in "C\:WINDOWS\System32\sysshtic.exe
this thing is all over my log viewer at Avast!

WHAT THE HELL IS THIS?! I’ve read that this is a blaster virus? Something like that?

Anyway… Avast! just won’t delete it… can ya guys help?

2

Use avast! to schedule a “Boot time scan”

To stop the 60 second shutdown, run the command

shutdown -a
3

Please continue HERE

4

Do what to the what?

And the shutdown -a dude… I wrote that it doesn’t work anymore!