Why did I get error 0x80040039?

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 0x80040039?

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
failed Event data test systemlog EventID String Binlog Error flush Time system Generated transaction Note occur TAPIEINVALPRIVILEGE 2664 Corruption 20140918 100847 MySQL help retrieved could LabWindowsCVI 185953 05202011 0x80040038 Studio Visual master debug mingww64 GitHub process with created object reference monitoring change name when privilege Invalid IOWARNINGLOGFLUSHFAILED DCDiag getting occured running management Interface COMOLE symbol 0x80050039 schema means FACILITYITF node Windows Cluster occurred Microsoft Install userdefined designated codes from returned msys2contribmingww64 ntiologch mingww64ntiologch administrator EATTACHREQUIRESELEVATION mirror development creating Contribute goes down EPROCESSTOKENACCESSDENIEDNOTS 0x80040037 mulesoftlabsramldotnettools ramldotnettoolsmsdbgh HRESULTinfo EOPERATIONREQUIRESELEVATION Tapi3Errh must ErrorCode insufficient privileges warning following messages understanding someone domain receiving Starting 0xC0002720 kccevent BB1S0001 passed This controller 114339 0x00000457 01252008 DC01 07072014 Hello Exchange errors Experts 01142014 CVIConstCVISRVREFAILEDTOLOADFPFILE 0x8004003A found function parameter Urgent Petri message remove after trying CVIConstCVISRVREPROJECTNOTINWORKSPACE specified Server 100032 ActiveX project removed CVIConstCVISRVRENOTFOUND cannot current workspace