I am dealing with a strange what-I-suspect-to-be-virus and could use some help. I have been spoiled by Linux for so long that I am clueless with virii now.

The machine is a cheap prebuilt Acer branded Pentium D 3ghz with SiS chipset. Running Windoze XP.

The machine has been used primarily for word processing and web surfing for the past 1 year.

The symptoms -
Upon booting, a few dialogues pop up, saying "Memory cannot be "read"". Name of the binary is different every time (that's why I suspect it to be a virus).

I formatted (quick option) the drive, and reinstalled Windows XP SP2 using a trusted media (XP CD with slipstreamed SP2 that I have been using for years). The problem remains upon the first boot.

I do have a second partition that I kept my data in, which might have carried the virus over, but I haven't accessed it since reformatting.

I have not installed anything yet. It was the very very first boot, not even drivers, and the dialogue shows up immediately after I log in.

The computer functions normally otherwise.

Suggestions?

Thanks