When turning on my computer between 3-5 seconds after doing so i get the message "a problem with the hard drive has been detected. please consult ur user's manual. press enter to continue.". i press enter and everthing loads up fine and my computer runs smooth. when consulting my user's manual it gives quotes of error messages and why you would get them but i didn't receive any of them that it states. i disk check and defrag about every 2 weeks. this is the first time i got this message. any idea why? thanks in advance.