I noticed an Error 1920 while installing 3ds Max 2012 Service Pack 2 x64. Error 1920 is a Windows Installer error code indicating I do not have sufficient privileges to start system services.
A simple workaround:
run a dos command prompt as Admin, navigate to the location of the msp file and type:
msiexec /update 3dsmax2012_sp2_64-bit_enu.msp