KB2468871 System Update Install Error! (error 643)

Anonymous
2011-08-11T05:29:29+00:00

original title: KB2468871 System Update Install Error!

Ok Now I have tried to install from windows update and manually trying to install this update KB2468871

It is not working and it keeps giving me an error

Error code 643.

Windows for home | Previous Windows versions | Windows update

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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Anonymous
2011-10-20T01:11:13+00:00

Finally after weeks of frustration I was able to fix this mess, none of the advice microsoft provided worked, uninstalling reinstalling, using microsoft .net removal tool, microsoft fixit, disabling UAC, and numerous other things which did nothing at all.

The source of this problem with KB2468871 is that a .dll needed for it to install is not present for whatever reason, copying and inserting the .dll where it needs to be will allow you to install this update.

Download the KB2468871 update here:

http://www.microsoft.com/download/en/details.aspx?id=3556

Try to install it, so that it extracts the needed .dll

C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Xml.Serialization\v4.0_4.0.0.0__b77a5c561934e089

Go to there and you should see the .dll file "System.Xml.Serialization.dll" If you can't find it do a search for it.

Copy it.

Paste it here C:\Windows\Microsoft.NET\Framework\v4.0.30319

And paste it here:

C:\Windows\Microsoft.NET\Framework64\v4.0.30319

Install the KB2468871 update you downloaded earlier.

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  1. Anonymous
    2012-01-14T03:22:33+00:00

    This worked perfectly! Thanks! Running Windows 7 SP 1 x64. This makes me think there is a serious fault with this update, need to see if it will work for my Vista x64 machine also.

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  2. Anonymous
    2012-01-18T17:17:24+00:00

    Worked like a charm.

    Thanks muchly - been waiting for months for help on this!

    Steve

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  3. Anonymous
    2012-02-11T01:40:11+00:00

    WOW!  Thank you SOOOO much for this solution!  Like you, I had spent WAY too much time and effort trying to get this resolved & was getting WAY frustrated (just ask my wife)!  Updating software should NEVER be this difficult!  Your solution worked slick as a whistle!  Give yourself a raise!  ;-)  YOU ROCK!!!!!  Ü  Ü  Ü

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  4. Anonymous
    2012-02-11T21:08:42+00:00

    Hello,

    This very same issue has been bothering me.

    Copying the file to the following locations solved it: (as mentioned above)

    C:\Windows\Microsoft.NET\Framework\v4.0.30319

    C:\Windows\Microsoft.NET\Framework64\v4.0.30319

    Running win7x64.

    Thanks!

    Regards

    Jani

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