Set Full Control permissions for Everyone on the following folders and registry keys:
C:\Fidelity C:\Program Files\Fidelity Systems C:\Program Files (x86)\Fidelity Systems (on 64 bit versions of Windows)
C:\ProgramData\GPoS Data C:\ProgramData\GPoS Mobile Data
HKLM\SOFTWARE\Fidelity Systems HKLM\SOFTWARE\Wow6432Node\FidelitySystems (on 64 bit versions of Windows) HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Reliability HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Reliability (on 64 bit versions of Windows)
UAC needs to be disabled, and GPoS needs to be run as Administrator for the first time.