I am working on a server that is running Windows 2003 R2 SP2 and Exchange 2007 SP2. I am preparing to migrate the exchange to new hardware and exchange 2013, and need to update the existing Exchange 2007 SP2 in order to do this. When attempting to install Rollup5, the installation says stopping services, then rolling back and ends prematurely, and creates an event log as per below. I have attached the verbose log. The same error occurs using microsoft update, and manually installing. I have re-registered msiexec, as well as reinstalled it.
Event Type: Error
Event Source: MsiInstaller
Event Category: None
Event ID: 1023
Time: 3:41:53 PM
Product: Microsoft Exchange Server - Update 'Update Rollup 5 for Exchange Server 2007 Service Pack 2 (KB2407132) 8.2.305.3' could not be installed. Error code 1603. Additional information is available in the log file c:\rollup5a.log.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp