2. Stand-alone start control panel select uninstall program
3. On the left side of the dialog box, find "Turn Windows features on or off" and click Open
4. Slide the bar down, find the files and folders related to the net framework, and then tick the front of the folder
5. Now see that the subfolder is not checked
6. Check it on
7. After the setting is complete, click OK to complete the setting
8. Windows is changing the function, please wait a few minutes
10. Restart the computer, and then test