1. Open Start.
2 .Search for regedit and click the top result to launch the Registry Editor.
3. Navigate to the following path:
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows
4. Right-click the Windows (folder) key, select the New submenu, and then choose the Key option.
5. Name the new key WindowsUpdate and press Enter.
6. Right-click the newly created key, select the New submenu, and choose the Key option.
7. Name the new key AU and press Enter.
8. Right-click the AU key, select the New submenu, and choose the DWORD (32-bit) Value option.
9. Name the new key NoAutoUpdate and press Enter.
10. Double-click the newly created key and change its value from 0 to 1.
11. Click the OK button.
12. Restart your computer.
13. Press the Windows logo key + R at the same time to invoke the Run box.
14. Type services.msc and press Enter.
15. Scroll down to Windows Update, and double-click it.
16. In Startup type, select "Disabled". Then click "Apply" and "OK" to save the settings.
17. Restart your computer one last time
18. Enjoy no more automatic updates