|If it's asking you to insert a disk it's probably not even booting into windows. In that case go into cmos/bios setup and make sure the hard drive is properly configured. Consult the motherboard/system manual if you need help with the specifics of your system.|
Or did you open the case and fiddle around inside? You may have disconnected something or, even worse, zapped it with static.
If bios setup is configured right for the drive and you haven't messed with anything inside then likely your hard drive has died.
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