The description of Game XP - Play With New Friends
Game XP powers up your computer by modifying the cache memory or the CPU priority.
It tweaks and modifies various XP settings (cache settings, CPU priority etc.) and optionally disables or stops several Windows services that are usually not needed.
Game XP creates a file which stores the Windows status before any modification, so the changes will be always safe.
It doesn’t need to be installed, but after running it you will need to restart the system so the changes will take effect.
You will notice it, because your system, and especially your games will work much better.