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I'm working on setting up BitLocker in Server 2012. After enabling TPS in BIOS, I attempted to enable Bitlocker. The following error appeared:

BitLocker Drive Encryption operating system drives must be formatted with the NTFS file system in order to be encrypted. Convert the drive to NTFS, and then turn on BitLocker

I then went to Disk Management and discovered two partitions without drive letters. One of these is FAT32, the other is an OEM Partition.

Disk Management shows two non-lettered partitions

Is it safe to convert the 2.00 GB FAT32 partition to NTFS on the fly? Will I lose data or cause the system to no longer boot?

  • Took a bit of a risk and convert it after reading where another person did so successfully. Rebooted and all is well (and the partition is now NTFS). – a coder Apr 12 '16 at 18:44
  • You can answer your own question. – Moab Apr 13 '16 at 0:31
  • Is that the reason for the downvote? Really? – a coder Apr 13 '16 at 14:20
  • down votes are anonymous and are only opinions. You need to post your comment as an answer, then you can accept it as a solution in 2 days. – Moab Apr 13 '16 at 16:35
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I went ahead and converted the unlettered "OS" partition as follows:

  1. Right click partition in Disk Management and assign a temporary drive letter Z.
  2. Converted drive Z ("OS" partition) from FAT32 to NTFS.
  3. Removed drive letter Z from "OS" partition.
  4. Rebooted

All is well. I was then able to configure and enable Bitlocker.

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