Foo - Need Help With Antivirus/Spyware

I'm having a continuing problem with my computer. I keep getting the same virus. My anitvirus removes it, and it keeps coming back. My system is an XP with service pack 3. I'm using two antivirus/spyware systems. Webroot 2010 Antivirus with Spy Sweeer 2010 with upgrade and Malbytes. I'm using the Microsoft Firewall that comes with Service Pak 3.
I've decided I'm going to have to go back to the basic XP program and recover it from within the system, but I'd like to know if there is some other program or action I should be taking cause this is driving me nuts.
Further info, it's a desktop and it is not wireless enabled.
Any help is GREATLY appreciated.
BTW the virus that keeps coming back is Mal/Enc PK-Bw

http://www.sophos.com/security/analyses/viruses-and-spyware/malencpkbw.html

Thanks 10 Wheels, but I did the "search and buy a program" thing before without success. I'm looking for something with a little more clout. The fact that the problems continue after I scan and remove tells me there's something way bigger going on here. But thanks for the suggestion.

I have been where you are right now...I feel your frustration.

Boot the computer in safe mode then scan and remove...if that doesnt work, then disable system recovery and rescan in safe mode. Always works for me on my desktop when I have a problem getting rid of a virus.

Boot the computer in safe mode then scan and remove...if that doesnt work, then disable system recovery and rescan in safe mode. Always works for me on my desktop when I have a problem getting rid of a virus.

And if that doesnt work...well either the scanner you use isnt very good, or you do really have something bigger going on.

Are you sure what keeps popping up isn't the virus in quarantine? Have you checked with your internet provider, mine offers a free anti-virus? Also, if you have a credit or fraud alert/protection plan they might also offer a free anti-virus, it's pro-active for them. I've had your problem before, I hope you can get it fixed with a minimal amount of frustration.

How long is it taking to come back? Scan remove and scan again and find it? Or scan, remove and a couple of days it is back? If it is back immediately, the remover isn't working properly, otherwise it might be getting removed and then you're re-infected by something you're doing/using.

I've seen one rootkit that created it's own hidden partition on the drive then reinstalled at boot. Sneaky. You'll remove it from memory and the primary partition, but it doesn't matter.

If Malwarebytes and Spybot don't find it, try Hitman Pro and Dr. Web. Boot into safe mode and run them both.

If all else fails, get out the drill press.

It sounds like it could be a boot virus written to CMOS. Those are nasty.

Please let us know how things go.

http://www.microsoft.com/security_essentials/

It's free.