1- Run command prompt (CMD) as Administrator. 2- Change directory to the directory in which the installer file is located. 3- Type msiexec /i "Quest GPOADmin.msi" and hit enter. Or, if you want the installer to create a log in verbose mode as well to review possible errors, then add parameter /l*v [log name]. For example msiexec /i "Quest GPOADmin.msi" /l*v Install.log.
At this point the installation wizard should run and complete successfully.