Why did I get error 0x80006400?

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 0x80006400?

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
word 0x80006300 Slide Image Uploading Write Memory Test 194613523 8139 Physical 0x00000000 20120912 fails 0x80006500">0x80006600 0x80006500 with 232714 pattern clock DansMacPro 0x02e00010 Wireless 0x2e400b90 0x400b9002 0xe400b900 Device 0x80006000 0x80006100 Version CommandLine AutoProgrammer 0x0a89402a 0x48 fpgaimgc 0x14 nvrd32 0x40008100 Hackipediaorg GeForceSensors 0x28900b24 0xb9002e40 0x03c20430 Spam 0x80006200 detected Wait Issue GSMForum kozlek Download 0x100 error Sent Response Succeeded 12092012 0x80006700 0x80006800 speed kernel0 temp 0x80006900 13102012 GitHub 09042013 0x80006A00 dadwarf associative 6554052 C66xx0 Initialize dataBufferReadSize 0x000000000 DPMC nNano Fill Units 0xffffffffffffffff Failed main 10000MHz1x10 1000MHz 0x33333333 0x44444444 Example setup endian little 0xDEADBEEF Concentrator 6553728 0x800064006553728 NOvA output data 092710 Readback 0x01000000 hierarchy Where 0x4000230a 0xb0 0x800c1011 0x40000300 32KB Cache 8way bits byte line size RLTK driver large Ping 0x80006408 Wayne Visser 0x000000a0 0x08010002 address 0x00a00000 packet 09032007 0xa0