This started a few days ago, i have changed nothing at all. I turend mouse smoothing off in the skyrimprefs file when i first got skyrim but turned it back on again because i liked it better. And now its not working at all. can any1 help?

Can only suggest deleting your ini files and let the game make new ones. All settings default can fix problems like this

Yeah ive tried that and also tried reinstalling the game aswell. Its really weird.