1. First, right-click the windows icon in the lower left corner of the screen to expand the menu and select the "Search" option to open it.

2. Then enter "Disk Cleanup" in the search box and open it.

3. In the pop-up window, select drive C by default, and then click OK.

4. Wait for the scan to complete.

5. You can check all the files in the list, or you can check the junk files that occupy a large amount.

6. Click OK and it will pop up. Are you sure you want to permanently delete these files? Click Delete File again.