this did not start happening until i restored my computer the last time, before that, it never occured, but i have misplaced my restoration CDs, and am looking to get my better computer up and running, just need a hard drive and o/s for it.
make sure your virus checker is disabled when playing games, if it is doing a system scan while you are trying to play games it will slow it up. Once you have finished playing games you can enable it again