1。 Reason: Because every time you install a software, you have to leave a lot of related files in the system folder. Even if you delete the software and clean up the garbage, you can't completely delete it, because the software can't be so smart.

2。 Solution: Therefore, it is suggested to reinstall the system once, refresh the system without additional software, then install commonly used software according to your own needs, then cut my documents from disk C to disk D, and finally make a system image of disk C with one-click recovery software. When you encounter a bloated disk C in the future, execute recovery software at startup, and one-click recovery is enough.

3。 Note: Remember not to put personal files on the desktop. These files are stored on drive C and will be overwritten when the system is restored.