Windows destroyed by Update

Question

Seit einem automatischen Update (etwa im März 2025) bootet mein Gerät nicht mehr. Die Starthilfe schlägt fehl. BitLocker war aktiv, ohne dass ich den Schlüssel bewusst hinterlegt habe. Ich muss einen Datenverlust riskieren. Ich bin der Meinung, dass das für ein modernes Betriebssystem inakzeptabel ist. Mittels ChatGPT habe ich bereits etliche Lösungsversuche unternommen. Alle scheiterten. Auch die Eingabe der zwei BitLocker-Wiederherstellungsschlüsseln, die für das genannte Notebook bei der Erstanwendung im Januar 2023 erstellt wurden, scheiterte. Dies ist für mich sehr bitter. da ich auf diese Weiter sehr wahrscheinlich viele mir wichtige Daten verlieren werde.

Answer 1

Hi, Dirk Vogelsang

 

Welcome to Microsoft Q&A

 

Thank you for your feedback. I have carefully read the information and description of your problem. I empathize with your current dilemma. The situation you described - an automatic update caused the system to fail to boot, the startup repair failed, and more importantly, BitLocker was activated without your knowledge, and the recovery key you have is also useless - this is absolutely a catastrophic experience

 

Now, our only goal is to rescue your important data. Please follow the following sequence strictly.

 

Step 1: You must try to find the correct key again from all possible channels. This is your only hope to recover your data without loss.

 

Please use another computer or mobile phone that can access the Internet normally. Open a browser and visit this only official address: https://account.microsoft.com/devices/recoverykey Log in one by one with all the Microsoft accounts you may have used on this laptop to check. After logging in, you will see a list of one or more recovery keys. Please carefully check the first few digits of the "Key ID" of each key and compare it with the "Key ID" displayed on your computer's BitLocker screen. Only the key with an exact match is the correct one.

 

In addition, please check other possible places:

 

Have you ever saved the key to a USB flash drive?

Have you ever printed it out?

If you are using it in a work or school environment, is it possible that the key is saved in the organization's Azure AD account?

 

Step 2: If you are 100% sure that you can't find a matching key, then it is impossible to unlock the encrypted hard drive directly. But there is one last hope-if BitLocker encrypts the system drive, and your personal data is on another unencrypted partition.

 

In this case, we need to remove the hard drive or use a bootable USB drive environment to access the data.

 

You need another computer and a blank USB drive. Visit Microsoft's official website, download the "Windows 11 Media Creation Tool", and make an installation USB drive. Insert the USB drive into your problematic computer and boot from it.

 

On the first screen of Windows Setup (the one where you select your language), press Shift + F10, which will open a Command Prompt window. In the Command Prompt, type manage-bde -status and press Enter. This command will list all the drive letters on your computer and their BitLocker encryption status. If you look carefully, your C: drive should be "Locked," but you may have a D: drive or other data partition that is "Unencrypted."

 

If you type notepad in the Command Prompt and press Enter, Notepad will open. Click Notepad's File > Open. In the "Open" dialog box, change "Files of type" to "All Files (.)." This dialog box now becomes a mini file explorer. You can use it to browse your unencrypted partitions, find your important files, and then copy them to an external mobile hard drive or another USB drive.

 

Finally, you should only consider repairing or reinstalling your system if you are sure your data is safely backed up or you are willing to accept the risk of data loss.

 

In WinRE, select "Troubleshoot" -> "Reset this PC". This will completely erase your hard drive and reinstall Windows. All data will be lost, but the BitLocker problem will also disappear.

 

Best Regards,

Kai Ho | Microsoft Q&A Support Specialist