Why did I get error 0x8000051D?

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 0x8000051D?

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
1030392 eid0x8000051dMon Applicationrn11280 cid0x00000003 085518 Event 10320174 20111309ASPNET Bo0m ECC1Bit 0x00000000 error Extended Notice Avatar 0x8000051E item 0x8000051B 0x80000519 information ESMPROServerManager users like site please 0x09000000 0x00110074 Backpack support servers Premium consider disabling adblock 103217465 0x800003b9 0x2105 1596 0x80000492 0x75b4 103217469 1309 unhandled exception 0xfa8e 382ASP Warning ESMCOMMONSERVICE0X8000051D SourceESMCommonService ID0x8000051D1309 POST STALL 0x80000526 SummaryECC1Bit show 1032173134 10320137 ospfd routeru jabuprosekczf String Replication could Generated 05142011 223157 22448 OSPF routers retrieved 0x503 zebra Time Need help Parsing Community Network DECN bootup Microsoft EventID application 20507270NoneWarning Errors disappearing into loopback mode when attempting ConnectX4 0x00000520 0x0011006c 0x00110070 16082016 0x00110064 0x00110068 logs 1030399 1404 0x800004eb MARC 0xed7a 0xa255 1495 0x80000549 0x95aa 0x57d6 10303918 10303965