The best thing I can recommend is telling her to stop downloading random things. That is one of the worst things I've noticed you can do. Both of my sisters have ruined their PCs more than once because they keep downloading stupid internet programs, clicking on banners that say "win money!", and clicking on every little thing. You need to tell her what she can do and what she has to stay away from if you want to make sure that a lot of spyware and pop up ads stay off the system.