The answer obviously depends on what is wrong with your XP. There are lots of factors that are involve before we can safely say the right way to repair your XP operating system. Some factors are caused by hardware while some are caused by software bugs.
Taking away the hardware factors, let us focus on software factors. I just recently discovered this site that offers a repair of your XP. It is not free, but its worth a try since most of us are not techie. If you are willing to pay the price, then this can be a good solution.
Reimage is offering its one of a kind pc repair technology to the general public. They claim that they can repair most XP bugs and other XP problems. Here are just some of the many things that it can repair:
Computer doesn't hibernate
Windows pop up message: “Task manager has been disabled by your administrator”
IP Config makes computer hang
Antivirus 2009/2008 cannot be uninstalled.
Antivirus 2009.2008 wallpaper hijack
Clicking Internet Explorer creates another short cut instead of opening the browser
etc. CLICK HERE.