KB946648

Hi,

Do you get any errors when the update fails?

Download the stand-alone version of this update and try to install it.

Visit this link to download the update:

KB946648- Security Update for Windows XP
http://www.microsoft.com/downloads/details.aspx?FamilyID=8f588f7e-c4ed-42a0-b157-54b1eda60474&displaylang=en

Before installing the update, temporarily disable any security software.

Make sure you turn it on as soon as you install the update.

You may refer these Kb article for help.

KB946648- description
http://support.microsoft.com/kb/946648

You cannot install some updates or programs:
http://support.microsoft.com/default.aspx/kb/822798?p=1

Regards,
Afzal-Microsoft Support.
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