Cannot install important updates: 643and 646 error Code

I regularly get asked to install important updates to windows but keep the receiver following error message after attempting to install updates

Windows Update has encountered an unknown error. Code 643
and
Windows Update has encountered an unknown error. Code 646
How can I fix this error and install the updates all the recommended

http://support.Microsoft.com/default.aspx/KB/923100/

When you try to install an update for .NET Framework 1.0, 1.1, 2.0, 3.0 or 3.5, you may receive Windows Update '0 x 643' error code or error code Windows install "1603".

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

For 646, try a manual installation of updates:

http://www.Microsoft.com/downloads/en/default.aspx

Put the number of theKB in the search engine > download/install the.

If this does not work:

Windows Update Forum:

It comes with Vista, upgrade install and activate Forum.

You will get the best help for any problem of Update/Service Pack in the Windows Update Forum; the link below:

http://social.answers.Microsoft.com/forums/en-us/vistawu/threads

When you repost here, kindly include the Error Codes, and exactly what is happening when you try to update.

In this way, you will receive the best help.

See you soon.

Mick Murphy - Microsoft partner

Tags: Windows

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