Why did I get error 0x80040DAA?

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 0x80040DAA?

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
item error builtin security descriptor because Please note valid wont they message when queries test123nsf added during contained control Details only removed ACEs entries 2013 WindowsSearchErrorsh mapping Application Context SearchServiceApplication PortalContent Catalog configured connector crawled SharePoint start 0x80040DA9 address database Notes check GTHREEMPTYDACL 0x80040DB2">0x80040DAE-WindowsSearchErrorsh-0x80040DB2-context-object">0x80040DAB Administration cannot Setup Upgrade 0x80040DAF 0x80040DB2">0x80040DAE 0x80040DB2 0x80040DB0 same still find could index also ignore building trimming information 2010 Server Express Lotus does messages regarding Search exist advice tips Processing failed errors 362SP multiple Thanks object 404SharePoint crawledThe 3498 364The crawl entry mappingview ship large gtsssomapnsf User 0x004 HRESULTS Software Sleuthing 27092011 folder will data GTHREFOLDERCRAWLEDBYANOTHERWORKSPACE 3497 0x80040D9F-because-scope-0x004">0x80040D9E 0x80040D9F 0x80040D9D 0x80040D9B 0x80040D9C 0x80040DA3 0x80040DA4 0x80040DA2 0x80040DA0 0x80040DA1 notesmoscow1namesnsf problems Access Default READ win32 ErrorCode 05072013 MSDN Microsoft GTHRECANNOTENABLECHECKPOINT GTHRESCOPESEXCEEDED GTHREOBJECTNOTVALID management hresult forum 04072013 Operations GTHREPROPERTIESEXCEEDED GTHREINVALIDSTARTADDRESS 0x80040DB7 0x80040DBA 0x80040DB6 0x80040DA5 0x80040DB4 COMOLE Interface List 0x80040DBB FACILITYITF