Hello Wild Peach
The amount of files you share should not affect your computer preformance. There are some things associated with the files that may be. When you DL from P2p networks the files placed on your hard drive are usually fragmented and you may need to defrag IE Start/Programs/Accesories/System Tools/Disc Defragmenter. Also you may be running out of hard drive space the only cure for this is to either burn files to CD and deleate from hard drive, or put anothe hard drive in your computerand and move your incoming and share folder to that drive. Sorry I do not know of any other solutions hope it helps.

Latter Grandpa