User files are user profiles. Once deleted, all user profiles will disappear. Don't delete the file unless you know its purpose. Generally, Win7p will take up about 18GB to 22GB after installation. If you want to optimize, you can only manually adjust the virtual memory file to 1GB and cancel hibernation (note that canceling hibernation requires a lot of electricity, which is not worth the loss), so the space released is about 10GB to 20GB.