Have you considered a fresh install of Windows XP?
Format the C: drive and install Windows again.
If you are still experiencing these issues after the fresh install, they might be hardware related.
Options to backup data before the format:
1. connect the hard disk to another computer and transfer the data.
2. Use a Live CD to access the data on your PC and make a backup.
Edited by ReviverSoft, 09 March 2010 - 07:53 PM.