The first file: documents and settings files.
The second file: ProgramFiles folder.
You can delete the windows prefetch folder. The cache generated by the computer system is generally in the Windows prefetch folder of drive C, and everything in it can be deleted.
In addition, log records can also be deleted. Log records are mainly the records of the system when the computer encounters unexpected problems, such as sudden exit of web pages and software flashback. This cleaning will not affect the system. If the LogFiles folder is found in windows——system32 on drive C, you can delete all the contents in this folder.
Extended data:
The computer can delete the temporary folder appropriately. These cache garbage are generated by the application and can also be deleted. There will be a temp folder in the windows folder. Just delete all the files inside.
These cleaning methods can quickly release C disk space and improve computer speed. However, the way to do this is to install the software on the C drive. When downloading software, change the default address, and create a new folder on disk D or F to place the software specially, so as not to occupy too much memory on disk C..