Xp slowing down

I have had XP installed for a while and now im getting sick of it.......My computer slows down big time playing games if my computer has been on for a while Someone help me please.......

 

A couple of things you can try...
Clean out your Temp internet/History files. Delete all that windows will allow you to from the C:\Documents and Settings\your login\Local Settings\Temp folder.
Delete all the prefetch files from the C:\Windows\Prefetch folder.

Run the windows defragmenter after performing the above operations.

If this doesn't help you may need to reinstall the OS over the top by using the "R" repair option. This bloke says how to perform an "R" better than me.

(note - edited to fix the "this bloke" link - Newt)

 

My dad think's its an Auto-Repair option in XP anyone know anything about something like that?

 

Are you saying your dad thinks the problem is due to an Auto-Repair option? If so, ask him

1) what the auto-repair option is
2) why/how it is causing a problem

Also, a couple of things you mentioned (games and "been on a while ") sound like a "memory leak" from some app. Games tend to do this. They will reserver memory to perform some function, not release it when done, and reserve some new memory next time. Pretty soon, you got no RAM left and have to use lots of pagefile (virtual memory) which is pretty slow.

Try rebooting, starting task manager (start~run~taskmgr) and setting options on it to just put a little icon in systray when minimized. Then look at the numbers for memory, cpu, etc., and minimize the task manager. Check it from time to time and see if the numbers have climbed and stayed high. If so, memory leak.

 

Check and see if you have hibernation enabled. It will start eating up your hard drive, in turn it will slow your computer down