looks like your trying to upgrade xp with vista which can be done, but not the best way. repeated upgrades with out a complete format of the harddrive is not proper.
you will never rid the computer of problems.
somehow you need a full install disk of xp or vista.
i would suggest an xp disk.
you give no details of the computer, so good advice is hard to give.

kj
computer corrections
cookson, ok