Product: Microsoft Exchange Server - Update 'Update Rollup 3 for Exchange Server 2010 Service Pack 2 (KB2685289) 14.2.309.2' could not be installed. Error code 1603. Windows Installer can create logs to help troubleshoot issues with installing software packages. Use the following link for instructions on turning on logging support: http://go.microsoft.com/fwlink/?LinkId=23127
A typical error message . I couldn’t find any information in the log file. However, the solution was an easy one! Run the install package as an Administrator or open a Command Prompt using Admin credentials and run the MSP package. I was getting the same error message on all Rollup packages.