windows server 2025 -blocking application installation and Windows updates

Question

Windows Server 2025 ver: 26100.32230

System suspends the process of installing new aplications and Windows updates.

I used this commend witch the ISO system:

DISM /Online /Cleanup-Image /RestoreHealth /Source:WIM:E:\sources\install.wim:2 /LimitAccess

But it not help.

Then I changed :

"HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "EnableLUA" -from 1 to value 0

This solution helps so now I can instal new apps.

The question is if its safe solution or exist any better solution to resolve this issue.

Regards Joseph

Answer 1

Hello Józef Oleś,

Thank you for reaching out. I understand you are facing issues with installations and updates on Windows Server 2025.

Setting EnableLUA to 0 is not a safe long-term solution. You have completely disabled User Account Control (UAC). While this stops the system from asking for permission, it removes a critical security layer. It allows any program (including potential malware) to make changes to your server without your knowledge.

The issue likely stems from UAC prompts getting stuck in the background or Windows Defender SmartScreen blocking the execution. Please follow these steps to fix the root cause:

1. Re-enable UAC:

• Change the registry key EnableLUA back to 1.
• Restart the server.

2. Fix Application Installs:

• When installing an app, right-click the installer and select Run as Administrator.
• Check Windows Security > App & Browser control. Ensure "Reputation-based protection" isn't blocking your specific apps.

3. Fix Windows Updates:

• Open PowerShell as Administrator and run these commands one by one:

        net stop wuauserv
        net stop bits
        Rename-Item C:\Windows\SoftwareDistribution C:\Windows\SoftwareDistribution.old
        net start wuauserv
        net start bits

Please try these steps and let me know the result. I am happy to follow up if the issue persists.

If it helps you get more insight into the issue, please kindly click Accept Answer so other users can find this solution.

Answer 2

The AI answer ist helpfull

regards Joseph