1. Boot into Safe Mode:
   - Restart your computer.
   - As the computer starts, press the F8 key repeatedly until the Advanced Boot Options menu appears.
   - Use the arrow keys to select "Safe Mode" and press Enter.

2. Enable the Administrator Account:
   - Once you're in Safe Mode, open the Command Prompt:
     - Click on the Start button, type "cmd" in the search box.
     - Right-click on the Command Prompt and select "Run as administrator".

   - In the Command Prompt window, type the following command and press Enter:
     ```
     net user administrator /active:yes
     ```

   - This will enable the built-in Administrator account on your system.

3. Switch to the Administrator Account:
   - Log out of the current user account.
   - On the login screen, you should now see the Administrator account.
   - Select the Administrator account and log in.

4. Open Command Prompt as Administrator:
   - Once logged in as the Administrator, open the Command Prompt with administrative privileges:
     - Click on the Start button, type "cmd" in the search box.
     - Right-click on the Command Prompt and select "Run as administrator".

5. Delete the User Profile:
   - In the Command Prompt window, type the following command and press Enter:
     ```
     net user [username] /delete
     ```
     Replace `[username]` with the name of the user profile that is encountering the error.
     For example, if the user profile name is "John", the command would be:
     ```
     net user John /delete
     ```

   - Confirm the deletion when prompted.

6. Restart the Computer:
   - Close the Command Prompt window.
   - Restart your computer.

After following these steps, the user profile that was causing the User Profile Service error should be deleted. You can then create a new user profile or log in with an existing user profile to continue using Windows Vista Integral Edition.

Please note that modifying user profiles and deleting user accounts should be done with caution. Make sure to double-check the commands and confirm the user profile you want to delete before executing the commands.