why blue screen asking for bit locker Microsoft 11

I am so glad you had the key printed.

Bitlocker is enabled by default when you set up the computer out of box. It typically wouldn't ask you for the key until a qualified trigger event happens, such as firmware update, hardware change, repeatedly wrong PIN/password entries, etc. This is why many users don't even know it is there, until one of the trigger event happens.

If data encryption is not important to you, you can turn it off to prevent this from happening again.

You can type cmd in the search on the taskbar, make sure you use "run as administrator" to launch Command Prompt, then run this command:

manage-bde -off C:

Let it run through. When it is done, the command prompt will return to the new row. Then you can run this command to verify status:

manage-bde -status

Hello,

I wish I could share good news, but the truth is no one can get you the bitlocker key, including Microsoft staff/support.

Have you looked into the Microsoft account here to see if it is stored there? https://account.microsoft.com/devices/recoverykey

Any chance your laptop was purchased used, or already set up for you? Or was it gifted? Or have you set it up with a different account at first? The key is stored with the very Microsoft account used to set up the computer for the first time, even if you had got rid of that account and set it up with a different account. So, if your computer was set up by anyone at the store you bought it from, it would be that person's account.

If you set it up with school or work account, it is worth checking here as well https://aka.ms/aadrecoverykey sign in with your work/school email credential in that case.

I assume you don't remember opting out of not saving it in Microsoft account, and saving it to a local file instead? That's another possibility.

If you can't find it at all, there's really no way to crack it. Bitlocker means business. If it can be cracked, then it means the encryption is not working. Your only option is to do a clean install of Windows. In that case, you do lose your files. I am very sorry. I hate to share this kind of information, but I rather give you the correct info.

I have Windows 11 24H2 and have been dealing with the same issue since the August 2025 Security Update. Out of nowhere, my computer shuts down and asks for a Bitlocker key.

It appears this problem was observed in Windows Server 2025 and Microsoft released a patch, https://support.microsoft.com/en-gb/topic/september-9-2025-kb5065426-update-for-windows-server-2025-os-build-26100-6584-6a59dc6a-1ff2-48f4-b375-81e93deee5dd.

Does the Windows 11 September 2025 security update have this fix too?