How can I repair my windows xp operating system ?

1. Try CCleaner by Piriform software.

   It is a free registry cleaner with which I have had good results.

2. Peter B on May 6, 2010 at 6:59 am

   There are a few things you might want to do.
   1. Virus scan
   2. Un install unnecessary programs
   3. Format your hard drive
   4. If it is a virus uninstall xp and then install it again (you can only do this 3 times with your serial # so keep this as a last resort)

3. DUNBAR PAPPY on May 6, 2010 at 6:59 am

   Before you do anything, back up your drivers and data to a CD!!
   It gets harder and harder to find aging drivers, and many places charge to get them.
   I use WINdrivers; excellent & free, from pc world here:
   http://www.pcworld.com/downloads/file/fi...
   Use the ‘back up all drivers’ for the first BU; that way you have them all.

   Data back-ups are separate items from system backups;
   Data are things you have created or added to you unit with programs: letters, documents, pictures, music, etc. These should be done every other week or 1X per month.
   Windows has a data backup built in, but I find it bulky & hard to use.
   One decent B.U. application is ‘Cobain’: moderately easy to use & freeware.
   Your 1st backup should be the ‘all’ data option as a baseline; after that use the ‘incremental’, which just adds new stuff to the baseline.
   ‘Cobain’ is here: http://www.snapfiles.com/Freeware/security/fwantispy.html
   Once your ’stuff’ is backed up, then you can do the system overhaul it sounds like you want to do. Good luck.