Windows stores drivers in C:\Windows\System32\DriverStore\FileRepository. If an incorrect security descriptor blocks TrustedInstaller or SYSTEM, any installation attempt fails with access denied.
Sometimes the very files the installer tries to update are corrupt and locked. ihv gui mui 64 access denied hot
When installing or using an IHV (Independent Hardware Vendor) driver that provides a GUI (installer or control panel) with a MUI (Multilingual User Interface) 64-bit package, an “Access Denied” error can occur. This article explains common causes and step-by-step fixes for Windows systems. ihv gui mui 64 access denied hot