How to Fix the "UIAccess=True Apps Fail to Launch for Non-Admin Users" Issue

Applications with the UIAccess=true attribute failing to launch for non-admin users can be frustrating, especially when working in environments where security and functionality are paramount. This issue typically arises due to system configurations, permissions, or security policies that block proper execution. In this article, we'll explore why this problem occurs and provide step-by-step solutions to fix it.

What is the UIAccess Attribute?

The UIAccess=true attribute in an application's manifest is designed to allow the application to bypass User Interface Privilege Isolation (UIPI). This functionality is often required by applications that interact with system-level UI elements or need elevated privileges to perform certain tasks.

However, for an application with UIAccess=true to work, it must meet strict security requirements:

1. The application must be digitally signed with a trusted certificate.
2. It must be installed in a secure directory, such as C:\Program File s or C:\Windows\System32.

Why Do UIAccess=True Applications Fail for Non-Admin Users?

Non-admin users might face issues launching these applications due to:

• Insufficient permissions.
• Misconfigured security policies.
• Incorrect installation locations.
• Missing or invalid digital signatures.
• Restrictions imposed by User Account Control (UAC) or third-party security software.

Step-by-Step Guide to Fix the Issue

1. Verify Digital Signature

Applications requiring UIAccess=true must be digitally signed. Follow these steps to verify the signature:

1. Right-click the application's executable file.
2. Select Properties, then navigate to the Digital Signatures tab.
3. Ensure the certificate is valid and trusted.

If the application is not signed, use a trusted code-signing certificate to sign it. You can use tools like signtool.exe for this purpose.

2. Install the Application in a Secure Directory

To comply with security policies, move the application to one of the following directories:

• C:\Program File s
• C:\Program File s (x86) (for 32-bit applications on a 64-bit system)
• C:\Windows\System32

Avoid installing the application in user-specific directories like the desktop or Documents, as these are considered insecure.

3. Enable UIAccess in Group Policy

Misconfigured Group Policy settings can block UIAccess applications. To fix this:

1. Press Win + R, type gpedit.msc, and hit Enter.
2. Navigate to: Computer Configuration → Windows Settings → Security Settings → Local Policies → Security Options
3. Find and enable:
   • User Account Control: Allow UIAccess applications to prompt for elevation without using the secure desktop.
4. Click Apply, then restart your computer.

4. Adjust UAC Settings

User Account Control (UAC) settings must be properly configured for UIAccess applications to work. Here's how:

1. Open the Control Panel.
2. Go to User Accounts → Change User Account Control settings.
3. Ensure the slider is at least the second level from the top (default level).
4. Save the changes and restart your system.

5. Check Permissions for Non-Admin Users

Non-admin users need sufficient permissions to access the application and its directory:

1. Right-click the application's installation folder.
2. Select Properties, then go to the Security tab.
3. Check that the non-admin user or group has Read & Execute permissions.
4. If not, click Edit and add the required permissions.

6. Address Third-Party Security Restrictions

Sometimes, third-party security tools or endpoint protection software can block UIAccess applications. To resolve this:

1. Check your antivirus or endpoint protection logs for blocked actions.
2. Whitelist the application in your security software.

7. Rebuild and Sign the Application (if necessary)

If the issue persists, you may need to rebuild the application with a proper manifest:

1. Add the following to your application's manifest file:

<requestedExecutionLevel level="requireAdministrator" uiAccess="true" />

2. Sign the rebuilt application with a valid certificate.
3. Reinstall the application in a secure directory.

8. Test the Application

After applying the fixes, log in as a non-admin user and test the application:

1. Launch the application.
2. Verify it runs without errors or requiring additional permissions.

Preventive Measures for Developers and IT Teams

To avoid future issues:

• Always sign your applications with a valid certificate.
• Install applications in secure directories.
• Regularly review and update Group Policy and UAC settings.
• Test applications on non-admin accounts before deployment.

Conclusion

Fixing the "UIAccess=True apps fail to launch for non-admin users" issue involves ensuring the application meets security requirements, adjusting system settings, and granting proper permissions. By following the steps outlined in this guide, you can resolve this issue and ensure smooth operation for all users.