From: kikocal on

I have windows XP and this update fails to install tried it various
times..Can anyone help.
Microsoft XML Core Services 4.0 Service Pack 2 (KB973688)

From: Ǝиçεl on
Security updates for Microsoft XML Core Services 4.0 Service Pack 2 may
repeatedly appear in the update list on Microsoft Update or on Windows Update
See <> for possible help.

If you can not rename msxml4.dll in normal Windows mode, than boot to
Safe Mode <> and do it from there:

How to obtain help and support for this security update KB954430 Microsoft
XML Core Services 4.0 Service Pack 2
For home users, no-charge support is available by calling 1-866-PCSAFETY in
the United States and Canada or by contacting your local Microsoft
subsidiary. For more information about how to contact your local Microsoft
subsidiary for support issues with security updates, visit the Microsoft
International Support Web site:
North American customers can also obtain instant access to unlimited
no-charge e-mail support or to unlimited individual chat support by visiting
the following Microsoft Web site:
For enterprise customers, support for security updates is available through
your usual support contacts.