Partition Damage is usually indicated by a error messages such as "Disk Boot Failure" or "Invalid Drive Specification" Message.

It can be caused by numerous occurrences including; Viruses, power surges, random mis-write, software updates, ect …

Technically, there is an incorrect value in the Partition Boot Record(PBR) on the hard disk. Any computer with a mis-match in the number of read/write heads reported by the Partition Boot Record and the systemBIOS will likely have this problem.

The first thing is to determine is if your problem is physical or Logical. The best way is to always keep it simple. Go to the BIOS and see if it detects your hard drive properly. If it does, you more then likely have a logical problem this isg ood news because it is fixable using  The Hard Drive Mechanic .