Hi! When the BIOS is updated, it is reset, and the TPM may have been cleared, which activated BitLocker. Since you couldn't unlock it using the conventional method, you should use WinRE.
Creating Installation Media
- To create an Installation Media, you will need the following items:
- A Flash Drive of 8GB or more.
- Another computer with Internet access.
ATTENTION: Back up the files on your Flash Drive to a safe location, as the Flash Drive will be formatted.
- Download the Media Creation Tools from the link below.
Windows 11
https://www.microsoft.com/en-us/software-download/windows11?msockid=3590798658a5614e31406dbf59bb60ff
Windows 10
https://www.microsoft.com/en-us/software-download/windows10?msockid=3590798658a5614e31406dbf59bb60ff
- Open Media Creation Tools > In the Permission Window, select "Yes".
- Accept the Terms > In the next window, check the option "Create installation media (USB Flash Drive, DVD, or ISO file) for another PC" > Continue.
- In "Choose how the media will be used", select the option "USB Flash Drive" > Select the Flash Drive > Continue.
- Wait for the Installation Media to be created.
Entering Recovery Mode (WinRE)
After creating the Installation Media, let's move on to the next step.
- Connect the Installation Media to your PC > Access your PC's BIOS and check if the boot order is correct.
- When turning on your PC, press the F2 keys without stopping until you access the BIOS. Also try the DELETE/DEL, F10, F8, ESC or F4 keys.
- Enter advanced mode (F7 key) > Go to the Boot > Boot Order option > Place the "UEFI: <Make and Model of Installation Media>" option first.
- If you have any doubts about which device you should put in First Place (#1), take pictures of the Boot tab and attach them to this topic.
- Save and exit (F10 key) >
- Now let's type the following commands.
ATTENTION: Type the entire command on the first line > Press ENTER > Wait for the command to complete > Run the next command in the list.
manage-bde -unlock X: -rp <Key>
- Replace the letter X with the letter of the Encrypted Drive (Usually "C") and then place the Colon.
- Replace <Key> with the Recovery Key (Including Dashes).
EXAMPLE:
manage-bde -off C: -rp 123456-789012-345678-901234-567890-123456-789012-345678
- Use the Command below to check the unlock status of the Encrypted Drive.
manage-bde -status C:
- When the "Percentage Encrypted" option is at 0%, it means the drive is BitLocker free.