A Reddit user has detailed a distressing experience in which the BitLocker encryption feature locked access to over 3 terabytes of personal data following a fresh installation of Windows 11, a scenario that could potentially affect any user running the latest Microsoft operating system.
The incident was reported by Reddit user u/Toast_Soup, who recounted that his computer began suffering from slowdowns and poor performance. In response, he decided to perform a complete system reset and reinstall Windows. His machine housed six drives in total, including the boot drive (C:) and two substantial backup volumes (D: and E:), which collectively stored approximately 3TB of invaluable files.
Upon completing the clean installation of Windows 11 and logging in, he discovered that both the D: and E: drives were suddenly encrypted by BitLocker, rendering his reserved data inaccessible. The system prompted him for a Recovery Key, a detail he claimed to be completely unaware of and had not recorded.
Crucially, the user stated he had never manually activated BitLocker. He was unaware that Microsoft’s default setup for a fresh Windows 11 install (OOBE) often enables this feature automatically once a user signs in with their Microsoft account.
Multiple data recovery programs he attempted proved useless as they could not bypass the BitLocker encryption, as the feature is designed to treat any access other than the authorised key as a hostile intrusion – even by the legitimate owner.
In desperation, he tried reinstalling Windows again, but this only complicated matters further as the newly installed C: drive was also locked and demanded a key. Fortunately, this time he was prepared and managed to note down the key for the C: drive, gaining access to the operating system, but the D: and E: data drives remained inaccessible.
A check of his Microsoft account revealed only the recovery key for the C: drive; no corresponding key for the 3TB data drives was found, suggesting the data was permanently lost.
The BitLocker feature, first introduced in Windows Vista in 2007, has since become a staple of the operating system. While automatic drive encryption offers strong security in theory, in practice it has created significant pitfalls for unwary users. Furthermore, the issue with BitLocker is not merely one of access, but also one of system performance.
Testing has indicated that BitLocker can reduce random read and write speeds on an SSD by as much as 45%, attributed to the continuous overhead of the CPU processing encryption and decryption operations. This performance hit could potentially explain the initial slowdown that prompted Toast_Soup to reinstall Windows, inadvertently triggering the data loss.
This issue is commonly reported following a ‘fresh install’ of Windows 11, but tends to be avoided by users who upgrade directly from Windows 10. Nevertheless, for comprehensive security, users are advised to proactively check their status.
My friend and I also encountered this problem when we tried to reinstall our Windows 11 a while ago, but we were none the wiser and ended up doing clean Windows installs, wiping everything off our machines. Luckily, we had our backups on our external hard drives.
How to check and manage BitLocker status:
Users should navigate to Settings > Privacy and security > Device encryption. If the setting shows ‘On’, the drives are encrypted. If the user has adequate backups and does not wish for automatic encryption, this setting can be disabled by selecting ‘Turn off’ and ‘Restart Computer’.
If a user wishes to continue using BitLocker, they should log into their Microsoft account via a web browser at account.microsoft.com/devices/recoverykey. Here, they can locate the 48-digit recovery key for any encrypted drives, which should be immediately recorded or printed and stored off the computer in question.
Disabling BitLocker, where appropriate, can ensure an SSD operates at its full potential and mitigate the risk of unintentional drive lockouts.