Agobot and Sdbot - Help Please

[TeeS]

Hi, trying to fix a freinds Sony Laptop. I have managed to rid it of a couple of Sasser varients, however I am stuck with:

"IRC/Backdoor.SdBot.22.AA" in C:\windows\system32\windates.exe

and

"Worm/Agobot.20.AN" in C:\windows\system32\sysconf.exe

I have tried Norton Antivirus several times but it does not seem to want to register on the Internet or update its database. AVG has been quite happy to find them but can not get rid of, or even move, the offending items.

Several hours on and I am out of ideas, is it a format and start from scratch or is there anything else I can do?

I am reasonable competent at tinkering but am no expert.

Cheers

TeeS