Windows Updates are automatically installed on the morning of the patch Thursday, you can install updates earlier by following these steps:
- Open Start Menu
- Scroll down through the programs Listed
- Open the Microsoft System Center
- Click to open Software Center
- Click Install all Required
When the updates are installed, you will have ~8 hours to reboot your machine via the pop-up prompt. Once the time expires, it will reboot automatically. Be sure to save your work prior to the reboot process.