When you come across these files and you try to make changes to them, you will receive an error message that states, “you require permission from trustedinstaller” to make these changes or to delete this file. Despite acting as an “administrator” in your system, there are important system files that you cannot rename, delete, access, or modify without permission from a Windows component called TrustedInstaller. As the primary user of your computer, you may be surprised to find that you do not have full control over every file on your system.