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[ The PC Guide | Troubleshooting and Repair Guide | The Troubleshooting Expert | Troubleshooting The System Overall | Troubleshooting Boot-Time Error Messages ]

Invalid partition table

Explanation: The system examined the master partition table to determine what volume to use to boot the operating system, and found invalid information within it.

Diagnosis: You should never see this message under normal circumstance. One way that this message can occur is if more than one partition is set "active" or bootable; only one is allowed to be at a time. It is possible that the master partition table has become corrupted.


  • The standard DOS and Windows disk utilities will not allow you to set more than one partition active. If you are using any funky utilities to manipulate the partitions, for example in a multiple-operating-system environment, run the utility from a floppy disk and make sure only one partition is set active.
  • There is a chance that the disk has become corrupted somehow. Troubleshoot this here.

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