Help with spyware/virus/trojan

[IKnowNot]

and the Housecall can not clean those virus/spyware/trojan (coz it's free??)

Maybe because the file(s) are in use and can not be accessed?
Maybe the file(s) just can't be cleaned at all and need to be deleted?

I repeated to format drive and reintall homeXP a few times, still could not get rid of those virus/spyware/trojan, is my BIOS infected? or somewhere?

If you think that is the case, what bios version are you running? Is it the latest for that machine?

While you are at toshiba's site looking for the latest bios ( using a known clean machine ) you might also want to download any other applicable updates and burn them to a disk or usb.

When I have to rebuild a machine, or for that matter build a new machine, I get all the updated drivers, etc. before I begin the rebuild process. Save them to disk, virus check everything, then begin my rebuild and install all necessary upgrades before I make any physical connection to the Internet. ( Even SP2 can be downloaded and put on disk. )

Then, as SirDice said, make sure the firewall is running then run windows update before going anywhere else on the net.

edit: Before you ask, try here: Windows XP Service Pack 2 Network Installation Package for IT Professionals and Developers