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.

0 comments
Answer accepted by question author
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.

Was this answer helpful?

1 person found this answer helpful.
0 comments

56 additional answers

Sort by: Oldest
Most helpful Newest Oldest
  1. Anonymous
    2012-03-14T14:28:37+00:00

    I worked like a champ with two servers that were experiencing this problem.

    You are a genius!

    Was this answer helpful?

    0 comments
  2. Anonymous
    2012-03-30T20:55:58+00:00

    Hello, I have had the same problem being that after many attempts, KB2468871 has failed to install, error code 643. Microsoft's solutions are not working for me.

    1. Managed to find this file System.XML.dll  but not System.XML.Serialization.dll

    Is there a diiference between these two files? If there is where can I download the System.XML.Serialization.dll file preferably from a Safe site. Could not find it in Microsoft's site.

    I hope someone can help/advise me. Please respond if you can!  Thank you!

    Was this answer helpful?

    0 comments
  3. Anonymous
    2012-04-04T23:46:48+00:00

    Hello, where can I get a copy of the System.XML.Serialization.dll 

    Is it available from Microsoft? I have tried to download from Microsoft site but could not find it.

    Does this remedy really work? for everyone or just a few?

    The file I have is System.XML.dll  Is this not the same?

    If I was to download a copy of the file from a third party site, would my Norton 360 V6 Anti Virus protect me?

    Many thanks for your advise.

    Was this answer helpful?

    0 comments
  4. Anonymous
    2012-04-05T01:44:04+00:00

    Was this answer helpful?

    0 comments