If Disk Cleanup is not working properly and does not remove Windows Update files, Temporary files, Windows.old folder, Internet files, etc. do this to fix the issue. Remove Temporary Files ...
The System Drive could be filling up automatically for several reasons ... Apply and then OK for the changes to take effect. Run Disk Cleanup Utility. Type in Disk Cleanup in the Cortana ...
It may be easier to buy an SSD right now, but keep in mind that its storage capacity is still relatively small, making it very easy to run out of ... in tools like Disk Cleanup target these ...