I got one recently, I found best thing do is:

#1 Create Backup of your Entire hardrive (inc Operating System), using Norton Ghost.

Or make sure you have a Windows (XP/Vista etc), BOOTABLE CD to re-install your Operating System (if you have one already, you may need to use KILLDISK (using a boot disk), and wipe your hardrive (always last resort) then install the Operating System.

I find, the best way, to have a your Original Disk that you got with your PC, or to get a Recovery CD-Rom (this deletes your Partition in your Drive, and install Operating System.).

ALways have an anti-virus program running (avast free or avg free), and try Malaware anti-spyware, Spybot. And try using Windows Washer to wash your System for files. Other then that, try to avoid going on the internet,.

Avg av is mediocre.Best is avira followed by avast.For cleaning after attack use malwarebytes antimalware(free) followed by full scan of disk with AV.
the following forums will be of help .
http://www.geekstogo.com/forum/Malwa...-Here-f37.html
http://www.bleepingcomputer.com/forums/forum22.html

I agree with you, I use avast, avg slows down my PC. Malawarebytes is amazing, I got a virus called svp2009, (totally destoryed my PC), and malawarebytes removed it. But damage was still done.

What is the name of the virus, did you make a Logfile at HijackThis http://www.hijackthis.de/en ?
Without knowing what kind of virus it is you can't solve the problem.

google svp2009, its not well known i think but probably the best virus. Malawarebytes is the only program i know that removes it. Hijackthis managed to stop its services, but didn't totally delete it

Malwarebytes is about maleware and will not do anything for viruses.

AVG is about viruses and will not do anything for maleware.

Slow or not, both are needed. I'd rather have a slow comp than problems. Besides, its really not all that slow, at least not on mine and my comp itself is rather slow. Anyway, be safe. And good luck.

YS,
Prtha devi dasi