Installation/Upgrading of SP4 on MSDE fails with 'Error: 0x800401F0'

When we run the service pack 4 setup for SQL 2000 MSDE we noticed that when we launch the service pack setup the setup.exe is launched (shows up in the task manager) but exits immediately without warning! Setup in SQL Desktop Engine (MSDE), rolls back and exits if a failure is encountered, unless you specify…

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