do i need to turn off bitlocker before installing windows 11?

In short, no, you don't need to disable BitLocker or Secure Boot to upgrade from Windows 10 Pro to Windows 11, but there are some caveats to be aware of.

You should keep Secure Boot enabled — it's actually a requirement for Windows 11. Windows 11 requires your system to be in UEFI mode with Secure Boot capability enabled. You can check your status by running:

  msinfo32

Look for:

• BIOS Mode → UEFI
• Secure Boot State → On

If Secure Boot is off, you can safely enable it in BIOS before upgrading, as long as your disk uses GPT (not MBR).

As far as BitLocker goes, you do not have to disable it to upgrade. However, it's strongly recommended to suspend BitLocker protection during the upgrade — this prevents the upgrade process from triggering recovery mode.

To suspend it:

manage-bde -protectors -disable C:

or via GUI:

1. Open Control Panel → BitLocker Drive Encryption
2. Click Suspend protection next to your OS drive.

After the upgrade completes, Windows will automatically re-enable BitLocker or you can manually do it:

manage-bde -protectors -enable C:

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hth

Marcin