Is there a problem with my harddrive or windows?

Is this happening in the BIOS (Before windows actually starts) or after you log on?

IF it is happening in the BIOS, your HD is probably loose. You’ll have to go into the case, unplug and then re plug in the cable going from the motherboard to your HD. It will either be a thin red SATA cable, or a flat, wide IDE cable.

Dude… the problem is you’re running windows. Period.

No. This is a harware problem, not software. A mac pro could easiy have the same problem.

Stop trolling, and have a nice day.

Mac fanboys, everyday I over see a network of 25 windows PC and 2 Mac G5’s guess what? The Mac’s give me the most issues, I have the screen saver set to never, yet still it comes on randomly! explain that oh and 1 G5 needs restarting at least 3 times during the day.

Anyway, I digress. To answer the question try booting into safe mode (f8 on startup) and see if it still happens. If it does then @Eambos answer is a good one. If not try a system restore and do a thorough virus scan.

It could be either/or. That’s your computer’s way of saying that it can’t find the operating system. That could be caused by software corruption or a failed hard drive. Either way, I hope you have your data backed up.

If you’re not at all technically oriented, it’s best to take it to a repair shop.

Hard drive or the cable or the mother board or the connector.

My boyfriend’s computer did this off and on for about a year and then HD just died, hard died.

most likely

your boot device order is wrong (bios)
or
your MBR has gone on vacation (hard drive)