Permission

Permissions

(1) Windows Platform

When using GeneralUpdate for automatic updates, you may encounter permission issues if the update directory is on the C drive, especially when replacing files or applying patches. With the introduction of Windows 11, permission management for certain directories on the C drive has become more stringent compared to previous Windows operating systems.

It's important to be aware of which directories might trigger permission issues:

Name	Directory
System Folder	C:\Windows
Registry Config	C:\Windows\System32\config
Driver Folder	C:\Windows\System32\drivers
Program Folder	C:\Program Files and C:\Program Files (x86)

Recommended directories to avoid permission issues:

Name	Directory
User Data Directory	AppData
System Temporary Directory	Temp

Lowering UAC

The following method is not recommended for use in production environments as it may cause issues for users. If you encounter UAC (User Account Control) prompts or permission/access denied issues during updates, you might consider lowering the UAC control level. This can be done by modifying the registry as follows:

Registry Name	New Value	Default Value
enableLUA	0	1
ConsentPromptBehaviorAdmin	0	5

Modify the above registry settings before the update (effective after restarting the computer), and be sure to restore them after the update is complete.

C# code to modify the registry:

using Microsoft.Win32;

public void UpdateRegistry()
{
    const string keyName = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System";

    using (RegistryKey key = Registry.LocalMachine.OpenSubKey(keyName, true))
    {
        if (key != null)
        {
            key.SetValue("EnableLUA", 0, RegistryValueKind.DWord);
            key.SetValue("ConsentPromptBehaviorAdmin", 0, RegistryValueKind.DWord);
        }
    }
}

Batch script to modify the registry:

@echo off
REG ADD "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v EnableLUA /t REG_DWORD /d 0 /f
REG ADD "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v ConsentPromptBehaviorAdmin /t REG_DWORD /d 0 /f

References:

Permissions​

(1) Windows Platform​

Lowering UAC​

Permissions

(1) Windows Platform

Lowering UAC