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Windows NT SP1 Blue Screens if an Extended Partition Exists Beyond 8GB

If any extended partition above 8GB (type 5 or 15h) is visible to NT 4 SP1, it will blue screen with inaccessible boot device. 

To correct this:

  1. Hide the extended partition.
  2. Boot Windows NT.
  3. Install a new service pack to prevent the error.
  4. Unhide the extended partition.


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