Technically, you can’t remove Bitlocker encryption without a password or recovery key. However, you can try entering different passwords you might have used to unlock your encrypted drive.

Without the recovery key, there’s no way to access the encrypted data — that’s why it’s important to keep it safe and backed up. How to Unlock a Windows PC Locked by BitLocker ...

Q: I recently installed BitLocker on my laptop in an effort to provide security for the data in the event the computer is lost or stolen. I used the option to create a Startup Key with a USB drive ...

If you have a BitLocker recovery key or you have backed it up to your Microsoft account on your Windows PC, you can use the recovery key to unlock the drive and install Windows without any issue.