So this is the first thing that we alway try, so if you find that Windows Update refuses to install patches it is very possibley because of the following DLL‘sfailed to be registered with Windows.  Just follow the instructions below to fix it.

Step 1. Open Notepad (or any text editor).

Step 2. Copy and paste the following command lines into the Notepad window (the /s switch runs the commands silently, freeing you from having to press Enter after each line):

regsvr32 /s wuapi.dll
regsvr32 /s wuaueng1.dll
regsvr32 /s wuaueng.dll
regsvr32 /s wucltui.dll
regsvr32 /s wups2.dll
regsvr32 /s wups.dll
regsvr32 /s wuweb.dll

Step 3. Save the file to your desktop, using a .bat or .cmd extension.

Step 4. Double-click the icon of the .bat or .cmd file.

Step 5. A command window will open, run the commands, and then close.

Let us know if this works for you or not in the comments.

If your not sure what IPCOP is check out: http://ipcop.org/index.php?module=pnWikka&tag=IPCopMissionStatement

We have also added Update Accelerator to the IPCOP box which allows us to cache Windows Updates locally for future windows updates. Check it out: http://www.advproxy.net/update-accelerator/

So far it has been working great accept for it having an issue with windows genuine advantage. Working on finding a fix for this so hopefully it will be working in the near future.