Why did I get error 0x80043645?

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 0x80043645?

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
WindowsSearchErrorsh FTEEPERFNOTLOADED Error 0x80043644 0x80043648 0x80043643-WindowsSearchErrorsh-0x80043644-0x80043641-0x80043640">0x80043642 0x80043643 0x80043649 0x8004364D Software 0x8004364C 0x8004364A 0x8004364B 0x80043637 0x8004363B 0x8004363A 0x80043638 0x80043639 0x80043640 0x80043641 0x8004363F 0x8004363D 0x8004363E first place loaded because they catalog been 13894 FTESREADONLYCATALOG 0x00043646 unloaded 0x004 27092011 User Sleuthing HRESULTS counters cannot monitor 13893 performance 0x80043636 SLEAUTHNCANTVERIFY 0xC004F062 0xC004F07A 0x80045367 FSRMEFILEMANAGEMENTACTIONTIMEOUT MSSEINVALIDAPPNAME 0x80042930 0x80042100 0xC004C781 hresult Other Errors HRESULTinfo 0xC0041108 ESEDEVICEDIGESTMISSING 0x800423F1 VSSEWRITERERROROUTOFRESOURCES SLESRVSERVERPONG FACILITYITF 0xC004B007 VDSEVDDISKALREADYOPEN httpswwwhresultinfoFACILITYITF0x8004364A httpswwwhresultinfoFACILITYITF0x8004364B httpswwwhresultinfoFACILITYITF0x80043649 httpswwwhresultinfoFACILITYITF0x00043646 httpswwwhresultinfoFACILITYITF0x80043648 0x80043634 0x80043635 0x80043633 win32 ErrorCode SYNCERANGEOUTOFORDER 0x80040208 0x8004100A 0x80040204 UPNPEDEVICENODEINCOMPLETE httpswww httpswwwhresultinfoFACILITYITF0x80043645 httpswwwhresultinfoFACILITYITF0x00040000 VFWEINVALIDDIRECTION 0xC004F307