Ok about a month ago I deleted some files (nothing in the Windows file). Since then I've had some problems. I don't remember what they were though. 1. When ever I explore any of my folders, after a minute or two (sometimes right away) I get a error pop up that reads "Data Execution Prevention" and "To help protect your computer, Windows has closed this program". When i click close message it closes the folder. Never messes with Mozilla, just when I'm looking at my files. If I keep going, I get an "Explorer.exe - Application error" with "the instruction at '0x000000000' referenced memory at '0x00000000'. The memory could not be 'written'" Click ok to terminate cancel to debug. 2. Also whenever I try to watch a video with Core Reactor Video Player, all i get is the tool bar, but no video window. I've tried reinstalling it. I've tried playing other files too. No luck. If I upgrade to windows vista would it take care of these problems?