When attempting to install the SPE 9.1 console on a Windows computer to which a previous version is already installed, the program terminates with an Install Error box: The previous installed version could not be found in registry
Release : 9.1.0.25
The program that terminated was msiexec.exe. It is attempting to open/read "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{0FC8A685-FDE5-47C7-878A-8534F5FEA2BC}" but is prevented by local permissions from doing so. UAC is likely turned up high.
Right click on the console installation program and select the option to "Run as Administrator"