My machine is a Windows 7 Ultimate x64 (Spanish) and whenever I try to execute "Console.exe" (v.2.0.b147 beta-x64) I get this error message: "Unable to start a %BASE%\ruby\bin\ruby.exe msfconsole %MSFCONSOLE_OPTS%!" and the application fails to start. Console.exe is not able to create a "cmd.exe" proccess as it did on a VM I tried without a problem.
I have once installed Metasploit on this machine, but at the time running the console.exe it is not installed (it was removed early ago).
I searched for any "Metasploit" "rapid7" or "console" string on the register and environment (PATH, etc.) and found nothing related. I didn't find any related file on the hard drive also.
I tried to take a look at the source code but without much success (long time ago my VisualC days...). I was trying to look where or how the "cmd.exe" proccess is created (maybe you could explaing it so I can help on this).
If you need more information or details, just ask!