This affects Windows 11 24H2 Pro and above, as well as the Home Edition.
The new installation doesnt start with a blue window but it seems to be similar to an in-place installation.
This move mainly ensures data security and privacy.
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What to do if you forgot BitLocker password?
How to recover the lost BitLocker recovery key?
If you are still vexed by these questions, read this post now.

Besides, Windows 11 24H2 automatic BitLocker encryption could impact system performance, particularly SSD performance.
Fortunately, you’re free to find some ways to prevent Windows 11 from encrypting drives during installation.
Step 3: Right-click onBitLockerand clickNew > DWORD (32-bit) Value, then name itPreventDeviceEncryption.
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Step 4: Set the value data to1.
Step 2: Download a Windows 11 24H2 ISO file.
How to install Windows 11 24H2 early preview before its official release on your PC?

Download its ISO file or update it via Insider Program.
Step 3: Connect a USB drive to your PC, grab the ISO image and clickSTART.
double-check to check theDisable BitLocker automatic rig encryptionoption, which can prevent Windows 11 from encrypting drives during installation.
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If you want to install Windows 11 from USB, how can you do this task?
It is an easy thing if you follow the complete step-by-step guide in this post.
Final Words
What if Windows 11 24H2 enables BitLocker encryption while reinstalling the operating system?
Do it by following the given steps now.