Tools: HP computer, windows 10, C disk cleaning.
1, start-run (shortcut win+r)-Cleanemgr.
2. Eject disk cleaning: drive selection (select the drive letter where the system is located; the default is drive C).
3.-C disk cleaning: pop-up-files to be deleted (all files can be deleted).
4. Select-Clean up system files-Eject again-Disk cleaning: drive selection-Files to be deleted (all files can be deleted).