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Windows Update Error Code 80070490


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I was directed here from the malware removal forum by "fenzodahl512". I keep getting this error code when trying to update windows. This has been a long standing problem (at least a few months) and now that the malware issue has been resolved, this problem remains.

I've googled the error code and have got various answers, but I'm not sure which one is correct. I'm missing out on important updates so would like to resolve this isssue if possible

Any ideas would be much appreciated :)


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I have a feeling you did not install all the MS & Windows updates! and/or Some Updates not installed? Over a period of time! Check back here for a follow-up post! See if they will put you in the malware HJK forum? Or someone with more info than me. Has a idea for your issue... regards..

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Check in Windows Updates (make sure you are using Internet Explorer) and see if there are any updates listed for your system -

Sometimes people forget that Internet Explorer must be turned on - Use this method to check - If you have had an infection it can alter I.E. settings -

Verify Your Internet Connection Settings:

  • Open Internet Explorer
    • Note: It MUST be Internet Explorer, not Firefox, Opera, Chrome or any other internet browser

    [*]Click on Tools at the top and select Internet Options

    • Note: If you do not see Tools, press the Alt key on your keyboard and it will show up

    [*]Click on the Connections tab

    [*]Click on the LAN settings button

    [*]Under Automatic configuration make sure that the box next to Automatically detect settings is checked, if it is not, then click the box next to it to check it

    [*]Under Proxy server make sure that the box next to Use a proxy server for your LAN (These settings will not apply to dial-up or VPN connections). is not checked and if it is, click the box next to it to uncheck it

    [*]Click on the OK button to close the Local Area Network (LAN) Settings window

    [*]Click on the OK button to close the Internet Options window

    [*]Try updating Malwarebytes' Anti-Malware again to see if it now works correctly

-THIS will show you the steps -

Thank You - :)

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Greetings :)

We'll start with some basic fixes first since that particular error code doesn't tell us much at all (it actually means An unknown error ocurred):

Run the Windows Update Readiness Tool:

  • Please download the appropriate version of the Windows Update Readiness Tool from the links below:

    [*]Double click on the file you downloaded to install it.

    [*]Once it completes, try Windows Update once more to see if it now works correctly.

If it worked, then stop there, if not then move on to the next fix:

Run the Windows Update Reset Tool:

  • Please download the Windows Update Reset Tool from here and save it to your desktop.
  • Double click the MicrosoftFixit50202 to begin
  • Follow the onscreen instructions and run it in Agressive Mode
  • Reboot your computer if asked to do so
  • Try Windows Update again to see if it works now
  • Let me know in your next reply if the issue is corrected or not

Thanks :)

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Apologies for the delay. I don't have access to the laptop during the week. Tried both tools but got the same error on restart. Unfortunately, the laptop is secondhand and didn't come with installation DVDs so I'm at a dead end with Microsoft it would seem. Any other pointers would be helpful

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Please do the following:

Note: This file will automatically restart your computer once it completes so save anything you were working on before running it.

  • Please copy and paste the following text in the Code box exactly as written into notepad (not wordpad or any other text editor):
    @echo off
    regsvr32 wuapi.dll
    regsvr32 wuaueng.dll
    regsvr32 wups.dll
    regsvr32 wups2.dll
    regsvr32 wuwebv.dll
    regsvr32 wucltux.dll
    regsvr32 wudriver.dll
    shutdown -r -t 10

  • Once you've done that click on File and select Save As...
  • In the Save dialogue box click on the drop down menu next to Save as type and select All Files
  • Name the file UpdateFix.bat (the .bat extension is very important)
  • Save the file to your desktop and double click it to run it.

Try updating again to see if it is now fixed.

Please note whether any of them report error messages and let me know which .dll(s) failed to register.

Thanks :P

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  • 3 weeks later...

Apologies for the delays

There were a couple of errors that occurred will running updatefix.bat

1. The module "wuaueng.dll" was loaded but the call to DllRegisterServer failed with error code 0x80070005. For more information about this problem, search online using the error code as a search term

2. The module "wudriver.dll" was loaded but the entry-point DllRegisterServer was not found. Make sure that "wudriver.dll" is a valid DLL or OCX file then try again

After it completed and restarted, Windows update still failed to work

Whats next? :)

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Run the Fix Windows Update Utility:

  • Please download the Fix WU Utility from here and save it to your desktop.
  • Extract the files and double click on FixWU.exe to run it
  • Once it loads click on the Fix Windows Update button
  • Once it completes you will see a box that says The process completed successfully, click on OK
  • Try updating again

Please let me know how it goes.

Thanks :)

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Didn't try that before...but have now and still nothing happening. I've noticed that when checking for updates, it states "never" under most recent check for updates and updates installed...which isn't the case. Not sure if this means anything or not?

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Alright, please try running it again, but a bit differently this time:

WGA Diagnostic:

  • Please download the WGA Diagnostic Tool from here and save it to your desktop.
  • Right-click on MGADiag.exe and select Run as administrator and click Continue or Allow at the User Account Control prompt
  • Please be patient, this process will take a while
  • Once it completes, click on the Copy button
  • Open Notepad and right-click in notepad and select Paste
  • Save the file to your desktop as MGADiag.txt
  • Visit Microsoft Update again to see if the issue is now resolved.
  • If it doesn't update, open MGADiag.txt and paste its contents into your next reply

Thank you :)

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Another M/soft solution ??

Keep following exile360 - But this is one I pulled from another Microsoft site -

Permanent Solution Re ; Error Code 80070490 ?

If you have a lot of time on your hands, turn on your computer and boot to Vista. Insert your original Vista DVD, then select "Upgrade" from the list, and let the program do the rest. It seems that this has been the only really successful way of getting the Windows Update to work again. A number of people have done this method and say it works. Note You may have to reinstall sound drivers once it is done.

To keep you busy - :)

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Firstly, thanks for the suggestion noknojon. I was mistaken previously when stating this was a secondhand notebook with no install dvd, it was bought new from dell website...but owner not sure if it came with a dvd...will need to hunt around for it, so will continue to follow exile360 in the meantime. I was hoping I wouldn't have to resort to that using the dvd

Secondly, tried running "MGAdiag.exe" again as administrator. It didn't actually take long at all and completed without any apparent problem. However got the same error as before after pressing "Copy":

"Failed to create output files, hr=0x8007000d. Please contact support."

Any further ideas?


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  • Root Admin

Please download and run the following fix from Microsoft How do I restore security settings to the default settings?

When completed please reboot your computer.

and save it to your desktop

Disable any script blocker if your Anti-Virus/Anti-Malware has it.

Once downloaded you can disconnect from the Internet and disable your Ant-Virus temporarily if needed.

Then double click
to run the tool.

When done, the
will open.

Click Yes at the next prompt for Optional Scan.

    When done, DDS will open two (2) logs:

  1. DDS.txt

  2. Attach.txt

  • Save both reports to your desktop

  • Please include the following logs in your next reply:

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