Setup Wizard for Update Rollup 1 for Exchange Server 2010 (KB240702) ended prematurely because of an error. Your system has not been modified.
Issue: you need to run with elevated priviledges. However since you do not have to right click and run as administrator as an option to run .msp files you can run them with elevated priveleges using powerhshell.
Lastly you can temporarily disable UAC. Go to msconfig, Tools, change UAC settings. Drag all the way to bottom and reboot. Re-enable after finishing installation.
James Chong (MVP)
MCITP | EA | EMA; MCSE | M+, S+
Security+, Project+, ITIL