Why did I get error 0x80040D9B?

Windows Update continous fails to search for Updates or cannot install them. The source of this problem could be various things as
> Windows Registry
> Windows Filesystem
> Internet access

> Windows Update service
> File corruption
> Misconfiguration
> Adware
> Virus and Malware

How to fix Windows Update error 0x80040D9B?

However, if you’re technically savvy, you can try the steps below:

1. Click Start and start typing on your keyboard for "services.msc"

2. In your search results "services.msc" should show up. Open it with a click.
3. A new windows will open containing all Windows services on your system.

4. Search for "Windows Update"
5. Right-click the "Windows Update" and then click Stop.

We will now clean the Windows Update temporary cache folder:
1. Hold your windows-key pressed and hit "R" key simultanous.
2. A small new windows will appear.
3. Type %windir%\SoftwareDistribution\DataStore in this new window and click OK.
4. This will open Windows Explorer on the correct location.
5. Delete all contents of this folder. (Hint: Use Ctrl + A to select all files and folders)

Now we will start the Windows Update Service again:
1. Switch back to the windows Services.
2. Locate Windows Update.
3. Right-click on it and choose Start.


If the problem still persists, you can run the System File Checker (SFC) utility. This handy in-built tool will check your filesystem.
1. Click Start and start typing on your keyboard for "cmd".
2. In your search results cmd should show up with an black icon.
3. Right-click it and select Run as administrator.
4. If you are prompted for the admin password, enter the password and click OK.
5. A new completely black windwos will open. You can type commands directly into this window.
6. Type sfc/scannow and press Enter.
7. This process will take a long time. You can minimize this black windows and work on.
Come back to the black window after a time and check if the process finished.
As soon as the SFC process finished, restart your computer. After the restart you search for Updates again.


You are still facing the same issue?

1. Restart your computer.

Next thing is to clean Windows Update download path. These steps are only for expirienced user! If you mess up your computer with Regedit, you could loose your files! Take care or use a professional tool to investiagte your computer.
1. Hold your windows-key pressed and hit "R" key simultanous.
2. A small new windows will appear.
3. Type regedit in this new windows and hit Enter.
4. In the new windows you have a navigation on the left side. Use it to navigate to
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
5. Once you found it, search for WUServer and WIStatusServer in the right hand pane.
6. If they are not listet we cannot clean the download path. Othwerwise delete both.
7. Restart your computer.

Try to search for new Updates again.
You are still facing this issue? I think this is not an usual problem and your computer should be checked by professional.
Try to look for a solution here or search further in the search box below.



Advanced information

The following Windows verisons are affected by this error:
> Windows Vista
> Windows 7
> Windows 8
> Windows 8.1
> Windows 10
> Windows 10 Redstone 2
> Windows 10 Creators Update
> Windows Server 2008 R2
> Windows Server 2012
> Windows Server 2016
0x80040D9C firmware dump 0x80040D9E GTHRENOTIFACCESSTOKENUPDATED GTHREPLUGINNOTREGISTERED 0x80040D97 properly WindowsSearchErrorsh 0x80040D9D GTHRENOTIFBEINGREMOVED 0x004 27092011 3483 User Software Sleuthing HRESULTS COMOLE Interface List FACILITYITF Error GTHREJETRESTOREERROR GTHREDIRMONNOTINITIALZED GTHREJETBACKUPERROR management hresult plugin 000000000000 00B1208638DE0FCD3E920886D658DAF6 0123456789ABCDEF 0000020000 0000020001002020 0000100000 0X8004069 0X8004300 0X8004314 0X8004065 0X8004067 0X8004068 0000010001002020 application installed contact registered computer Check 3484 04092017 00000000000000000000000000000000 Microsoft Product Support 0x80040DB0 chip wouldnt back after flashing start shown entry investigation quick well fine Page Groups opensource Boldclash bwhoop except more thought didnt thinking would point 0x80040DA2-0x80040DA1-0x80040DA2">0x80040DA4">0x80040DA3 0x80040DA2">0x80040DA4 0x80040DA2 0x80040DA0 0x80040DA1 0x80040DA5 0x80040DAE 0x80040DAF 0x80040DAB 0x80040DA9 0x80040DAA 0x80040D9F past win32 located 0x80040D9 which ErrorCode 0x80040D95 0x80040D96 0x80040D8E 0x80040D8B 0x80040D8D