Input the BitLocker recovery key. Wait until the unlock period expires, and then enter the correct PIN. Reinstall the operating system, and then reset the TPM chip.

In Windows 11/10 and TPM 2.0 now, the BitLocker PIN length was increased to 6 characters. Also, the TPM 2.0 lockout period is greater than the default when a PIN is changed.

BitLocker enables whole-disk encryption to provide efficient, easy-to-implement data protection that systems admins can manage. ... and best practices. Delivered every Monday, ...