2. In the pop-up property menu, select General and click Disk Cleanup.

3. Wait for the disk to clean up the computing garbage.

4. Select the garbage to be cleaned, and then click OK.

The above is Bian Xiao's use of win 10 system to clean up the garbage on disk C, and the operation of win7 is similar. If your computer is stuck, you might as well try to clean up the system C disk.