Why did I get error 0x800001B9?

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 0x800001B9?

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
PStateReg 0x00000010 0xC0010066 0x80000186 0x80000193 Forums 0xC0010064 0xC0010065 101010 18032014 Report 0x800001B90x0000241B 0x8000019B0x00004C18 THGru 0x800001D20x0000301A 0x800001C00x00004019 HWMonitor 0x3C00444C system KILLING 0x3C003403 Steam Users 0x3C00240A 0x34003403 0x4000404C CPUID 0x2400240A Tech Support Forum random times tried 1fps Cataclysm seems constantly updating 0x800001B90x0000301C 0x800001D50x00003C1B 0x800001C20x00004C1A Page drivers closing Crashes Dropping Randomly World 0x8000019B 0x800001B90x00002C1B 0x800001D20x0000381A 0x800001C00x00004819 Warcraft used happen before never Battlenet 29012011 This 003954 christos 0x8000028b NetBSD unicodedata320cv 20120605 0x800001b4 Computer IncForum Best 0x800001b6 0x80000292 ASUSTeK ptid0x9e00x1 focus problem st0x20020000 Mozilla noncontribution into 0x01554321 owner0x800001b9 fowner0x800002c1 id0x2c fl0x17 rest66518228 501444095 1146 0x80000003 0xDEB9 1059 0x6BD3 1010141 101012 0x3451 Freezing issue 10082 1384 0x80002C55 10084 0x3C00200A 0x3C003003 0x3C00404C configuration DRAM 18112009 Ospf Networking Toolboxcom 14072003 Show Toolbox Groups