It is suggested to download and install a 360 guard, then open the space to clean up, slim down the C disk, and transfer all the transferable software and files to other disks.
Or reinstall the system, simple, quick and thorough!
It is recommended that your computer have a plan:
In addition to installing at most one guard or antivirus software in the system, other things should not be put on the C drive, including pictures and videos and cached data.
Tidy up the space and put all the software on the D drive.
Set the e-disk size for storing files and all personal data.
The drive f can be smaller. Set QQ, browser and other software that need to cache files in the application, select the cache path, and customize Drive F. ..
This is neat and orderly and does not interfere with each other.