Why did I get error 0x800404B1?

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 0x800404B1?

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
System Configuration ProcessLiteralCondition failed public const CComponentGetDisplayInfo with data operation type IDSUNEXPECTEDLINKENTITY 0x800404B5 valid only entity 0x800404b2 Dynamics Unexpected link locating IDSINVALIDPROCESSLITERALCOND specified This 2147220303 attribute Rollup 0x800404B4 queries 0x80004001 IDSINVALIDROLLUPCOND GetOptionString authentication 1201 Exception History Call Windows values pseATTRTYPECOERCIONFAILED passed match been fixed Users 07102015 coercion console reported uncheckedint0x800404b0 2010 unManagedemptyprocessliteralcondition unManagedinvalidprocessliternalcondition uncheckedint0x800404b1 Release Support 22112011 Tech Notes OSIsoft Cannot install more denied failure However might Invalid argument 0x800404B6 permission than startup component referenced prevents PISDK PIUser Groups 5652OSI8 Deleting while sending returned registering from admin server 2147220302 C12ServiceResponseSGERR 0x800404A2 C12ServiceResponseNRY 0x800404A0 C12ServiceResponseSGNP 0x800404A1 0x800404B0 Error Code Programmer NoSuchProperty InvalidChecksum CLoginDialogLoginToServer Opensource Interface MErrorEnum WengerGroupSettingsAdminNoPassword WengerGroupSettingsUserName C12Adapter Class C12ServiceResponseRQTL 0x8004049F C12ServiceResponseRSTL Reference C12ServiceResponseNETR 0x8004049E ErrorCodescs Synchronize external CRegisterServerOnOK ServerNodecpp1319 CServerNodeRetrieveServerInfo systems 2147220301 unManagedmissinglinkentity uncheckedint0x800404b2 using change 05032016 LoginDialogcpp796 CLoginDialogAttemptLogin 24032016 Sinting 02052011 CLoginViewLoginHandler Answers logging Problems CRegisterServerInsertServerIntoRegistry Laserfiche client into