The software's own uninstaller uninstalls its own program, which may not completely clean and delete files. You can check whether there are any files in the program files folder.

In addition, some software will put some user files in the personal folder (My Documents) by default, which will also take up the space of the C drive. You can transfer money.

In addition, most of the virtual memory can be transferred to disk D. I can familiarize myself with the advanced system settings in my computer-Advanced-First Settings-Advanced, and set a reasonable size.