Disk C is a system file, and it is easy to cause problems if it is deleted incorrectly. You can use the cleaning program that comes with the system to clean it.

Please refer to the following:

1. Click the Start menu in the lower left corner of the desktop, and then click the Settings icon.

2. Click the system in the upper left corner of the interface, as shown in the figure below.

3. Continue to click Save in the toolbar on the left side of the interface, as shown in the following figure.

4. Turn on the storage sensor switch and click "Free space immediately".

5. Wait a few minutes, and the system will automatically scan, as shown in the figure below.

6. Click "Delete File", and all useless files in drive C will be deleted.