can somebody please help me with this problem im going crazy!! my computer fails to boot properly i turn on and sometimes i just get a black screen. sometimes it starts the boot sequence but doesnt detect my cdrom drive. and sometimes it starts fine and says that my computer has recovered from a serious error but when i turn off the computer it all starts over again i have tryed reinstalling windows god knows how many times but it only fixes the problem temporaraly until i switch off again any ideas???