The module "WUAUENG.DLL" was loaded but the entry point DllRegisterServer was not found

Question

Hello everyone.

This is the cause of too many problems to list here. Read the top picture, pay close attention to the RegSvr32 message. The ending on the first line has me perplexed.

These pictures below are of the entire "D" DLL section of Windows > System32 folder.

They are inserted as they appear in the folder in order.

(And just on the off beat chance it might be in the SysWOW64 folder, I checked there as well, negative on find the missing DllRegistryServer file.)

So here are those pictures for the none believers, and please explain how I fix this.

The story on the first picture says it all, and if possible, I do not want to install fresh again, that will be number 8 on that hit parade.

Any and all assistance on this would be appreciated, as for waiting for the next Windows Update, that is not possible because the Update is broken with "KB5058499" and will not fix with all the available avenues.

CMD and otherwise.

Answer 1

Hello, I am Henry and I want to share my insight about this issue

• DllRegisterServer is an optional function. It is a specific "entry-point" inside a DLL file that is used by some older components (especially COM objects) to register themselves with the Windows Registry.
• Most modern DLLs, including WUAUENG.DLL, do not have this function. They are registered with the system through different, more modern methods (like manifest files) when Windows or an application is installed.
• You will not find a "DllRegisterServer file." It's not a separate file; it's a function inside the DLL, and in this case, it doesn't exist by design.

If you are trying to manually register WUAUENG.DLL with RegSvr32 will always fail with this exact message, because you are using the wrong tool for the job. The problem is not that WUAUENG.DLL is broken or that a file is missing. The problem is something else entirely, and your attempt to fix it by running RegSvr32 is what's generating this specific (but misleading) error.

I recommend you perform these steps to fix the corruption:

Step 1: Run the System File Checker (SFC) and DISM. It will scan for and automatically repair protected system files.

1. Run in CMD with Administration: sfc /scannow
2. Wait for the scan to complete. It may find and fix errors.
3. After it finishes, type the next command and press Enter. This repairs the core Windows component store, which is often the source of update issues. dism /online /cleanup-image /restorehealth
4. Once both commands are finished, restart your computer and try running Windows Update again.

Step 2: Run the Windows Update Troubleshooter (in case SFC and DISM dont resolve the issue)

Step 3: Perform an In-Place Upgrade (Repair Install not Fresh Install)

1. Go to the official Microsoft Windows 11 Download page.
2. Find the "Download Windows 11 Disk Image (ISO)" section.
3. Download the Windows 11 ISO file to your computer.
4. Once the download is complete, right-click the ISO file and select "Mount". This will open it as a virtual drive.
5. Open the mounted drive and double-click the setup.exe file to begin the installation.
6. Follow the on-screen prompts. When you get to the "Ready to install" screen, make sure it says:
   • Install Windows 11
   • Keep personal files and apps

I hope this helps you.