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October 24th, 2024 20:06
Workaround: BitLocker prevents Sysprep on VM in 24H2
As of Windows 24H2, BitLocker now auto encrypts drives in VM. Here's how to work around this.
Error "Prepare Capture Failed #sysprep"
Log file at c:\windows\system32\sysprep\panther\setuperr.log contains:
SYSPRP BitLocker-Sysprep: BitLocker is on for the OS volume. Turn BitLocker off to run Sysprep. (0x80310039)
WORKAROUND:
To disable BitLocker - open a command prompt with admin rights and run the following command.
manage-bde -off C:
It may take a few minutes to decrypt. You can view the status by running
manage-bde -status
Once the drive is fully decrypted, rerun Image Assist.
Thanks,
Tyler
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DFW-EE
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1 Message
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March 11th, 2025 20:13
Tyler,
You nailed it. My image was failing with SysPrep error and the log mentioned the Bitlocker. First I checked in the control panel to see if Bitlocker is ON/OFF and strangely the control panel shows it as OFF.
I then ran the command to check status "manage-bde -status" and in mentioned Encryption was active. Its weird that windows control panel wont show it as active when it actually is active.
I ran the command "manage-bde -off C:" like you mentioned and checked the status until if was fully decrypted. My image is finally capturing.
Thanks mate!
bdonato1973
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1 Message
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March 17th, 2025 17:09
Thank you, this solution worked out great! This thread should be marked "problem solved".