Player doesn't work

Just came home from a trip to the winterlands in Sweden. Sat down at my computer and started flash. Exported a movie and everything looks just fine. I quit flash and then try to start the .swf. Flash player starts but nothing more. The window is totally white. Strange I think and try to start some other swf’s. Same thing. Hmmm…
If I drag the swf’s to the browser, they work out fine, so I guess my flashplayer, not the plugin, is wacko…
So this is my question: Do I have to reinstall The whole program or is it possible to just reinstall the player?