Microsoft activates a setting that could make you lose all your data: Here’s what you need to know

In its effort to improve security in Windows 11, Microsoft has enabled a feature by default that could put your personal files at serious risk. While meant to protect users, this silent change has already caused confusion—and data loss—for many.

BitLocker is now on by default in Windows 11 24H2

With the rollout of Windows 11 24H2, Microsoft now activates BitLocker encryption automatically during fresh installations. This tool encrypts your device’s entire content, making it unreadable without the proper credentials. Although intended as a safeguard against unauthorized access, it introduces major risks if users are unaware it’s running.

The problem appears during system failures or hardware changes

The main issue arises when users attempt to recover data after a system crash or device change. BitLocker requires a recovery key, and most users don’t know it’s needed—or where to find it. This has led to numerous complaints on forums like Reddit, where people report being locked out of their own devices, unable to access their photos, documents, or backups.

No warning during upgrades from Windows 10

Even more concerning, this default setting can silently activate during upgrades from Windows 10 to 11, without notifying the user. As a result, many are discovering the encryption only when it’s too late—during troubleshooting.

What users should do now

If you’re using Windows 11, check if BitLocker is enabled and locate your recovery key immediately. Microsoft stores it in your Microsoft account by default, but not always. Backing up critical files outside your device is now more essential than ever.