BleepingComputer.com: downgrade to xp

hello, i am new to these forums, i got the virus windows police pro, probably the newest version and everything that i try i cannot get rid of it, it disables everything, running exe's booting from windows disk running system restore the task manager, everything, so i figured hey ill wipe the disk clean with kill disk so i kill all the partitions on the computer hoping to get rid of the virus and i pop the xp disk in (mind you my comp did not come with a copy of vista) and it says the same thing check the disk for viruses before installing and it and i am left in no OS? i cannot even boot into safe mode because the whole disk is cleaned but windows xp disk still says there is a virus. please help its my mothers computer!!

What exactly is it saying?

Windows XP does not check for viruses before installing

a problem has been detected and windows has been shut down to prevent damage to your computer.

if this is the first time you have seen this stop error screen restart your computer. if this screen appears again follow these steps

check for viruses on your computer. remove any installed hard drives or hard drive controllers. check your hard drive to make sure it is properly configured and terminated. run chkdsk /f to check for hard drive curruption and then restart your computer

technical information:

*** stop: 0x0000007b (0xf78d2524,0x0000034,0x00000000,0x00000000)

thats about it and i cant run chkdsk at this point. thanks

FIXED!!!! it was the sata setting in the bios that need changed to ata instead of whatever vista uses which is not compatible with XP awesome thanks for the help.