KB2668562 error 80070643 (Silverlight)

On February 14, 2012, in Security, by


If you are installing KB2668562 for Silverlight and it’s failing, you are not alone.

Hang loose for now.  It appears that it’s actually getting installed but just bogusly (if that’s a word) putting up an error message.

Redmond has been alerted, they are investigating.  Hat tip to Seve Ward, Consumer Security MVP for the reports.



Subject:     RE: Slow going on that Silverlight KB2668562 patch
Date:     Tue, 14 Feb 2012 22:25:56 +0000
From:     Doug Neal 
Reply-To:     Patch Management Mailing List
To:     Patch Management Mailing List

Thanks to responses on this listserver, we’ve looked into the Silverlight update, have identified a metadata (logic) error and will be releasing a revision to correct this very soon.

Consider holding off on this update until a revision is published and visible in your WSUS/SCCM consoles – or simply allow auto-approval to permit the revision to replace the original version.  We have similarly ‘down throttled’ unmanaged (consumer) machines until the revision is released (throttled at 0% = no consumer machines will get this installed automatically – but users who open WUApp and choose it, will still be able to run it – even though it will fail).

doug neal
Microsoft Update (MU)


5 Responses to KB2668562 error 80070643 (Silverlight)

  1. Carol Shock-Regalski says:

    What is WSUS/SCCM consoles . Will this update show up again in automatic window updates? That is how I get all my updates now, automaticall in windows updates. What are we supposed to do?
    From what I understand I am not the only one getting this error.
    Please tell me what I should do.
    Thank you very much.

  2. Louise Cornelissen says:

    installing is failing

  3. KS says:

    Still fails here with error 0x8000663 (yes, only 7 digits)

  4. admin says:

    You’ll need to call 1-800-microsoft and indicate you are having an issue with a security update. i don’t have a solution for an 8000663

  5. Zoe mcCrow says:

    It wont install and it doesn[t recognise I have silverlight on my windows 7 computer and it also wont uninstall,