I have Win XP home edition and it rox It came with our compaq and i have had very lil problems with the OS I have had problems with Tweak XP the shareware program doing bad thins to my OS without my consent so recently i had to do a full reinstallation b/c of Tweak XP (Ill never use it again and i dont recommend it to anyone) but i downloaded my Windows Updates and like it did b4 it came up with a couple new drivers to Download ( I have a Celeron 1200mhz) and it said updated processor driver now my processor is called a Pentium III Xeon should i keep this or roll back to the driver taht came with my system is this normal please I need reassurance

If it's running w/o any problems and performance is as it was previously, then you may just want to leave it alone.
If you're concerned about the CPU's performance, there are free speed checking programs available.