Ghost 14 - error 1500 - Another installation is in progress

I tried to Repair my Ghost 14 installation and get an error 1500, saying another installation is in progress and it won't proceed. 

 

This is after seeing a briefly flashing message every 90 seconds "SymSnapService is not started.  Net help msg 3521"

 

 

How should I proceed to fix Ghost if I can't use repair or remove in the installer?