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"Create Image" function dialog will fail to create an Advanced method boot media on Win 11 24H2 (April 2025 Updated) OS, if UAC is enabled in OS (Error: oocode:CENgine::AssembleBootableImage:CreateSpecificWindowsImage:Result=General) 

NovaBACKUP Boot Media Creation Problem on Windows 11

What's the Problem?

If you're using Windows 11 (version 24H2 from April 2025) and trying to create advanced boot media in NovaBACKUP, you might see an error message when clicking "Create Image." This happens because of a security feature called User Account Control (UAC) that's turned on by default in Windows 11.

Error you might see: oocode:CENgine::AssembleBootableImage:CreateSpecificWindowsImage:Result=General

Who Does This Affect?

  • Users with Windows 11 24H2 (April 2025 update)
  • Anyone trying to create "Advanced method" boot media

Quick Solutions

Option 1: Temporarily Turn Off UAC (Recommended)

This is the easiest fix, but requires administrator access to your computer.

Step 1: Check Your Current Settings

  1. Right-click the Start button and select "Terminal (Admin)" or "Windows PowerShell (Admin)"
  2. Type this command and press Enter: 
    Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "EnableLUA"
  3. Look for "EnableLUA : 1" in the results (1 means UAC is on)

Step 2: Turn Off UAC

  1. In the same window, type this command and press Enter: 
    Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "EnableLUA" -Value 0
  2. Restart your computer (this is required!)

Step 3: Create Your Boot Media

  • After restarting, try creating your boot media again in NovaBACKUP
  • It should now work without errors

Step 4: Turn UAC Back On (Optional but Recommended)

  1. Open Terminal (Admin) again
  2. Type this command and press Enter: 
    Set-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name "EnableLUA" -Value 1
  3. Restart your computer again

Option 2: Use a Different Computer

If you can't or don't want to change UAC settings:

  • Install NovaBACKUP on another Windows computer (Windows 10, 11, Server 2019, or 2022)
  • Create the boot media on that computer instead
  • The boot media will still work on your original computer

Why this works: The boot media doesn't need to be created on the same computer where you'll use it.

Option 3: Change Service Settings (Advanced Users Only)

Warning: This method can cause other problems and isn't recommended for most users.

If you're comfortable with Windows services:

  1. Open "services.msc"
  2. Find "Disaster Recovery Imaging" and "NovaBACKUP Backup/Copy Engine" services
  3. Change their "Log On As" setting from "Local System" to an Administrator account
  4. Restart the services

Downsides of this method:

  • Some backup features may stop working
  • Settings reset after software updates
  • May cause other unexpected issues

Important Notes

  • Security consideration: Turning off UAC temporarily reduces your computer's security, so turn it back on when you're done
  • Alternative versions: This problem might also affect other versions of NovaBACKUP and Windows
  • Company policies: If you're using a work computer, check with your IT department before changing UAC settings

Need More Help?

If none of these solutions work for you, contact NovaBACKUP support with:

  • Your exact Windows version
  • Your NovaBACKUP version
  • The complete error message you're seeing

This guide simplifies the original technical documentation to help non-technical users resolve boot media creation issues with NovaBACKUP on Windows 11.