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: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2015-07-24T05:55:16+00:00

    Hi All,

    I have Dotnet 2, 3, 3.5 and 4 installed on my computer and i tried to install KB2468871 with the tricks specified above in the comments, but still it is getting failed.

    I have tried to repair dotnet with utility but it is not working for me.

    Can anyone help me on this ? do i need to remove dotnet 3 and 3.5 as well ?

    Thanks in advance

    Lokesh Jangir

    Was this answer helpful?

    0 comments
  2. Anonymous
    2014-10-28T17:29:38+00:00

    Works like a charm

    Was this answer helpful?

    0 comments
  3. Anonymous
    2014-08-04T00:52:33+00:00

    Glad I was able to help. It's bizarre that Microsoft hasn't addressed this issue yet.

    Was this answer helpful?

    0 comments
  4. Deleted

    This answer has been deleted due to a violation of our Code of Conduct. The answer was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

    Comments have been turned off. Learn more