how to overcome error msg? also have conflict with hr:0x80070643--am running Windows XP

Dear Frank -I found the site below and thought of your situation. Here is the message I received:-------"Network error occurred while attempting to read from the file:C:\\WINDOWS/Installer/Messenger.msiPlease close all other open programs, and then try again. It looks like another program is preventing the installer from working. hr.0x80070643"-------If it's the same message, and you haven't found a solution yet, then this will do the trick. Although it's an older post, it works just fine for the current 14.0.8117.416 Messenger update issue:http://www.pcadvisor.co.uk/forums/index.cfm?action=showthread&threadid=346865&forumid=1Scroll about halfway down the page. Look for Microsoft Customer Support (Joan, Technical Support, Live Essentials):Note: For the Windows Installer Cleanup Utility, I downloaded from this link (you'll want the latest version wherever you get it - 2.5.0.1):http://www.softpedia.com/progDownload/Windows-Installer-CleanUp-Utility-Download-18442.htmlAfter all the time I spent looking for a solution, this took 10 minutes to solve. I hope it works for you as well. Please pass along. Thanks. Deb