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RE: XPS 15 9550 - TPM has "disappeared"

Sorry guys but none of these posts are helping.  I had no issues flashing the BIOS either back to 1.1.15 or back up to 1.2.10.  The problem is that the TPM hardware device is GONE from Device Manager.  Without the TPM, BitLocker won't encrypt the drive.

If I go into Device Manager there is no "Security Devices" item in the list, which is where the TPM chip was previously.

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