Regarding the capacity of your C drive, please refer to the following scheme to see if it can help you:

1. It is recommended that you temporarily turn off system updates:

Start menu-Control Panel-windows update-Change settings-Select "Never check for updates".

If necessary, I suggest you check what updates you need according to the prompts, and then log in to official website to download and use them: /zh-CN/windows/downloads.

2. If the system restore point function is turned on, the system will create a restore point and back up the data, so the space will be reduced and the system will not automatically know the previous restore point, so the space will be reduced and the system can be restored.

Try to turn it off. Computer-Right Click-Properties-System Protection-You can click on disk C to turn off the system restore function.

3.hiberfil.sys, a dormant file, also takes up a lot of space on drive C, and its size is the same as your computer's physical memory. You can try to turn off hibernation and run cmd.exe as an administrator to open a command line window, and then run: powercfg -h off. Note that the hidden file hiberfil.sys left on the C drive can

Unhide and delete directly.

4. The virtual memory pagefile.sys also occupies the space of drive C, which is 1.5 times of the physical memory by default.

If none of the above operations can solve your problem, it is recommended that you use the system CD to reinstall the system and partition it after backing up the data.

I hope the above reply can help you.