Well thanks guys for the input. The prefetch is stored programs the once loaded they go to the prefetch area and does not have to be loaded by the computer again.
I thought that if I had some bad dialogs loaded deleting the already loaded ones would load new ones the were good. I didn't know about the prefetch thing. I have 3 usb on the Acer and I have tried them all. Some times when I use FS it really works well then it quits. I really just use ga planes because I don't really expect to be flying 737s and up. Well I just will use the Dell to fly until I can fix the problem but it will be slow.