1. First, go to the windows 8 system, click the "Settings" superbutton as shown in the following figure, and then click "Change computer settings" below, as shown in the figure:
2. Click "computer settings" on the left, click "general", and then click the "Advanced Startup" option. The details are as follows:
3. Find "Restart Now" and you will see the "select an option" interface, as shown in the figure:
4. After entering the page, find "Troubleshooting". Click to open the "troubleshooting" option menu, as shown in the figure:
5. Find "Advanced options" and click it to open the "Advanced options" menu, as shown in the figure:
6. Now you will see a "startup settings". Click to go to the "startup settings" prompt page and click "restart", as shown in the figure:
7. When the computer is started up, there will be a "boot option menu (Boot settings)", as shown in the figure:
At the same time, the f8 setting will take effect. Please try it.