My computer is full of viruses and I downloaded avira and zonealarm but I still get trojans every time I start up. A friend told me that I should re-install windows xp and this would fix it, however when I try to UNinstall the xp that’s on there on safemode command prompt it will not let me because I don’t not have the "registry information." However, I believe this would be impossible to obtain seeing as I bought the IBM used! I clearly don’t know very much about this but is there any other way to uninstall windows xp or can I just install it over the old one (or would the damage stick? ) ?
I don’t care about saving old info I just want a clean computer!

Tips are much appreciated 🙂