Why did I get error 0x80040802?

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 0x80040802?

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
public const SYNCECONFLICT SYNCENOPARENT 0x80040803 0x80040804 0x80040801 SYNCEIGNORE Google 0x00040820 SYNCEUNSYNCHRONIZED MAPI Error TypeDefect SYNCWPROGRESS master script 0x80040800 SYNCEOBJECTDELETED 0x80040805 GitHub Kopano Code Gears Steve SYNCEINCEST SYNCWCLIENTCHANGENEWER 0x00040821 Solution attempted MAPIEAMBIGUOUSRECIP been does task Cause exist timer already exists 0x80040700 ComponentInstaller MicrosoftMIEngine requested MIEngineAD7Hresultcs create 0x80041001 EITFINCOLLECTION Correct specified call ENOCODECONTEXT gearsgooglecom Fixed render doesnt Version02 Duplicate storage Failed Installation correctly Windows require rights admin should Version01 Safari Accepted PriorityHigh Longterm uncheckedint0x80040900 EAUTOATTACHACCESSDENIED MicrosoftVSLua VSLuaAD7Hresultcs uncheckedint0x80040803 EBADCLRDIASYMREADER uncheckedint0x80040801 ECLRSHIMERROR uncheckedint0x80040802 EBADCLRDIASYMREADERuncheckedint0x80040802 0x80040900 SYNCECYCLEDETECTED Archive MAPIENAMEDPROPQUOTAEXCEEDED inverseincopenchange EAUTOATTACHACCESSDENIEDuncheckedint0x80040900 ECLRSHIMERRORuncheckedint0x80040803 openchangemapicodes EAUTOATTACHWEBSERVERNOTFOUNDuncheckedint0x80040901 Groups Seeing default 06072007 detected object NoParentFolder x02080480 internet with proxy found Firefox browser directly connect changes occurred IgnoreFailure ignore safe Codes MSOXCDATA Microsoft MSDN x01080480 superseded Conflicting SyncConflict because perhaps question change Errors Common Manual Administrator 0x00040680 MAPIELOCKIDLIMIT Appendix MAPIWPARTIALCOMPLETION Solutions Process M4ILLEGALLRN 0x80040000 Scripting Server Honeywell Reference 0x8004060D fine installed skalmagooglecom Thanks entered setting options into Knowledge wiki 11082016 Base Everyone wrote Zarafa means