Right-click the system disk, Properties General-Disk Cleanup
Wait for the scan to complete, and then click Clean System Files.
Wait for the scan to complete again.
Lists all the rubbish or files that can be cleaned up. Check and make sure to delete and clean up most of the space.
Path 2: Move the virtual memory to another drive letter.
Right-click the computer, Properties-Advanced System Settings
Click Settings under Performance.
Advanced, click Change under Virtual Memory to cancel "Automatically manage paging file size".
Select a drive letter, click the Set button, confirm, and then restart to free up space.
Path 3: Turn off system protection (choose this option according to personal needs).
Right-click the computer, Properties-System Protection.
If drive C has protection turned on, click Close, and then click Configure to clear the restore point.
Path 4: Use third-party software to clean up the system, such as various guards.