How to enable or disable automatic updates in Windows 8

1. Open up Control Panel via Run (Windows Hot Key + R)

2. Scroll down and click on Windows Update. Make sure to have a grid view of all the items in Control Panel

3. Click Change settings on the left column.

4. Click the drop down bar under Important updates. Select the last option Never check for updates (not recommended) if you want to disable automatic updates. The rest of the options can be checked based upon your preferences.