MS13-061_ Exchange2010-KB2866475-x64-en.msp requires Exchange Server 2010 SP3 installer for installation
MS13-061_ Exchange2010-KB2866475-x64-en.msp requires SP3 extracted on the machine for proper installation. If the installer is not present the update does not install on the machine and fails with the exit code:-1603
The update ask for installation media when you try to manually install it on the machine.
To install the update MS13-061_ Exchange2010-KB2866475-x64-en.msp on the machine. Please follow below steps
PMS 6.2,7.0 and 7.1 RTM
Exchange Server 2010 Service Pack 3