How to solve the problem when the C disk is full?

C disk full solution is as follows:

Tools/Materials: Dell XPS 13-9350-3708, win7 7,360 Security Guard 6.26.

1, open 360 security guards, and then click on the computer in the lower left corner to clean up.

2. After entering, click on the system disk in the lower right corner to slim down.

3. At this point, the system will be scanned.

4. Check the part in the red box that needs slimming after scanning, and click Slimming Now.

5. Check the files you want to move, and then click Move Now.

6. After the movement is completed, it is equivalent to cleaning disk C..