Hello Iain McGuinness,
thank you for posting on the Microsoft Community Forums.
Based on the error message you provided, it seems that BitLocker is having trouble enumerating the drive bands on your SSD. This could be caused by a number of factors, such as outdated drivers or firmware, or a hardware issue with the SSD itself.
Here are some steps you can try to resolve the issue:
- Update the firmware and drivers for your SSD.
- Check the health of your SSD using a diagnostic tool. Many SSD manufacturers provide their own diagnostic tools that you can download and run.
- If none of the above steps work, you may need to contact your SSD's manufacturer or replace the SSD.
Hope it helps.
Kind regards,
Lei