newguys said:
Things in this world is full of surprises...
1st thing .. Check if there any spyware or virus
2nd thing .. try do a System Repair...
3rd thing .. backup your important file before repair.. just in case anythings goes wrong.
2 choices you have : 1st choice : (Start Button -- > RUN -- > type in "SFC") this will try search and fix some corrupted files.
2nd choice : Insert your WindowXP CD do a repair.Try boot from the CD. *Notice: On the 1st message come out mentioning Repair.. just skip this part, by pressing ESC, then F8 for agreement, then it will prompt out founded previous Windows, Now you press "R" for repair. No need worry bout all the program you have installed, it will be there, window will just do a repair like upgrading.
Good Luck...