It happend a while ago and i called hp last night and they deleted the upper and lower filters in regedit.exe and.....well it doesnt work now again! And i put a cd in and it like revs up a lot fast like its full burning mode but it wont recognize the cd that i put in, any cd. I dont know what it is but its driving me crazy and im really mad because it did work but not its not. I cant restore my computer to that point anyways because when it is done and boots back up it says it didnt complete or messed up. HELP THANKS