0x8009000F Error: TPM Initialization Failure

1. Remove and Recreate the PIN (Windows Hello)

1. Go to Settings → Accounts → Sign-in options.
2. Under PIN (Windows Hello), click Remove.
3. Restart your PC.
4. Re-add your PIN by clicking Add PIN under the same settings.

2. Delete and Rebuild the Ngc Folder

This will reset your PIN and may affect other authentication methods.

1. Press Win + R and type: C:\Windows\ServiceProfiles\LocalService\AppData\Local\Microsoft\NGC.
2. Delete all files in this folder.
3. Restart your computer and set up your PIN or Windows Hello method again.

3. Run System File Checker and DISM

1. Open Command Prompt as Administrator.
2. Run the following commands one by one:

sfc /scannow

DISM /Online /Cleanup-Image /RestoreHealth

1. Restart your system after the process completes.

4. Clear Windows Credential Manager

1. Go to Control Panel → Credential Manager → Windows Credentials.
2. Delete any stored credentials related to MicrosoftAccount, Outlook, Office, or live.com.
3. Restart your system and try logging in or syncing again.

5. Reset TPM (If Using BitLocker or Encryption)

1. Press Win + R, type tpm.msc, and press Enter.
2. In the TPM Management window, select Clear TPM.
3. Restart your system and reinitialize TPM if required by BitLocker.

6. Create a New User Profile

If your user profile is corrupted:

1. Go to Settings → Accounts → Family & other users.
2. Click Add someone else to this PC and create a new user account.
3. Log into the new profile and check if the error persists.