To remove Microsoft administrator account from Windows 11, you’ll need to follow these steps:

1. Open Settings: Click on the Start button and then click on the Settings gear icon (or press Windows key + I) to open the Settings app.
2. Navigate to Accounts: In the Settings app, click on “Accounts”.
3. Select Family & other users: In the left sidebar, select “Family & other users”.
4. Choose the Administrator Account: Scroll down to the “Other users” section. Find the Microsoft administrator account you want to remove and click on it.
5. Click on Remove: After selecting the account, you’ll see an option that says “Remove”. Click on it.
6. Confirm Removal: Windows will ask you to confirm that you want to remove the account. Confirm your choice.
7. Complete Removal: Follow any additional prompts to complete the removal process.

After completing these steps, the Microsoft administrator account will be removed from your Windows 11 system.