Windows Update Error Code C80003F3 commonly occurs while trying to install a Windows update or starting the WU software programs. This problem could be caused due to corrupted Windows Update files or de-registered in all DLLs updates.
With this error code, you could see the following error message:
Error(s) found: Code C80003F3 Windows Update encountered an unknown error.
In this guide, we have explained all the possible methods that may help you to fix this issue. So, let’s find out the way.
Windows Update Error Code C80003F3
To fix Windows Update Error Code C80003F3 on your Windows system, follow these suggestions:
- Use the Windows Update Troubleshooter
- Check Windows Update Services status
- Reset all Windows Update components
- Perform SFC and DISM scans
- Re-register Windows Update system files (.dlls).
Before you begin, create a system restore point first. Doing this will help you revert back the changes if you ever need it in the future.
To have the best result, I would like to recommend you try out the suggested methods in the same order as it is done here. Let us see them in detail –
1] Use the Windows Update Troubleshooter
Windows Update Troubleshooter is the one the simplest method you can try to fix the issue on your Windows 10 PC.
To do this, open the Windows Settings > Update and Security and then select the Troubleshoot tab.
Now switch to the right pane, select Windows Update, and then hit the Run the troubleshooter button.
Furthermore, you can also try Microsoft’s online troubleshooter and check whether it helps you to get rid of this problem.
2] Enable Windows Update services
As per the users’ report, they got able to fix this problem just by enabling those essential Windows Update services that weren’t working.
To enable them, you first need to open an elevated command prompt.
Once it opens, copy and paste the following text code and then hit enter after each command.
SC config trustedinstaller start=auto SC config bits start=auto SC config cryptsvc start=auto
Then reboot your Windows device and check if the issue is resolved now.
3] Reset Windows Update components
Reset the Windows Update component to default manually. Now restart your computer and once it starts up, check if the problem still persists. If it is, then move down to the next effective workaround.
4] Perform SFC and DISM scans
Sometimes this serious problem can also occur due to having certain file corruption and system issue. In this case, it is always suggested to run the System File Checker tool.
To run the SFC scan, open an elevated command prompt and then type in the following command –
sfc /scannow
Then hit Enter to start the scanning process.
Once it completes the process, reboot your device, and then run the DISM tool to repair the damaged system files.
In an elevated command prompt window, copy and paste the following text code. Also, hit enter after each command to execute it.
Dism.exe /online /cleanup-image /scanhealth Dism.exe /online /cleanup-image /restorehealth
Wait for a while until the process gets completed. Once it gets completed, restart your computer and check whether it resolves the issue.
5] Re-register Windows Update system files (.dlls)
Another possible cause of occurring the error C80003F3 is the DLL file. Maybe it is not registered in the correct way. This problem has been basically found on the older Windows version. So, if you are also one of them who is facing this problem, you need to re-register all the DLLs updates.
To do this, open Run dialog box using the Win+R keyboard shortcut.
Type in “notepad” and hit Ctrl+Shift+Enter Shortcut key to run Notepad as an administrator.
If UAC prompts on the screen, click on the Yes button to grant the administrative privileges.
Inside the elevated Notepad, copy and paste the following text code –
net stop bits net stop wuauserv net stop appidsvc net stop cryptsvc Del "%ALLUSERSPROFILE%\Application Data\Microsoft\Network\Downloader\qmgr*.dat" Del %windir%\SoftwareDistribution\*.* /S /Q Ren %windir%\system32\catroot2 catroot2.bak sc.exe sdset bits D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU) sc.exe sdset wuauserv D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU) cd /d %windir%\system32 regsvr32.exe /S atl.dll regsvr32.exe /S urlmon.dll regsvr32.exe /S mshtml.dll regsvr32.exe /S shdocvw.dll regsvr32.exe /S browseui.dll regsvr32.exe /S jscript.dll regsvr32.exe /S vbscript.dll regsvr32.exe /S scrrun.dll regsvr32.exe /S msxml.dll regsvr32.exe /S msxml3.dll regsvr32.exe /S msxml6.dll regsvr32.exe /S actxprxy.dll regsvr32.exe /S softpub.dll regsvr32.exe /S wintrust.dll regsvr32.exe /S dssenh.dll regsvr32.exe /S rsaenh.dll regsvr32.exe /S gpkcsp.dll regsvr32.exe /S sccbase.dll regsvr32.exe /S slbcsp.dll regsvr32.exe /S cryptdlg.dll regsvr32.exe /S oleaut32.dll regsvr32.exe /S ole32.dll regsvr32.exe /S shell32.dll regsvr32.exe /S initpki.dll regsvr32.exe /S wuapi.dll regsvr32.exe /S wuaueng.dll regsvr32.exe /S wuaueng1.dll regsvr32.exe /S wucltui.dll regsvr32.exe /S wups.dll regsvr32.exe /S wups2.dll regsvr32.exe /S wuweb.dll regsvr32.exe /S qmgr.dll regsvr32.exe /S qmgrprxy.dll regsvr32.exe /S wucltux.dll regsvr32.exe /S muweb.dll regsvr32.exe /S wuwebv.dll netsh winsock reset netsh winhttp reset proxy net start bits net start wuauserv net start appidsvc net start cryptsvc
Then click on the File menu and select the “Save as” option. Alternatively, you can use the Ctrl+Shift+S shortcut key to save the file.
Here you need to choose a suitable location, give a proper name, and then save the file with .bat extension.
When the batch file is created, then do a right-click on the saved file and select Run as administrator to execute the text code.
Once it completes the procedure, close the Notepad window and try to install the Windows Updates again.
I hope this guide helped you to solve the issue.
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