Windows Media Player crashing computer

ok this problem just started not too long ago and i have no idea how it happened. Everytime i open a file (media file, video or audio) it automatically opens with Windows Media player it says connected (opening file) and then my system does a hard reboot. I've tried numerous files and it does it with all of them. I opened files with winamp and it doesnt crash my computer. I uncheck the "auto-restart" and it has something to do with p17.sys file. I have no idea how to fix this can anyone please help me.