Gh 14 won't install on vista 64bit

I had Ghost 12 on my computer - when I try to install version 14 the installer tells me that Ghost 12 must be uninstalled - it proceeds to do that and then stops with the message that the installer has been interupted and no system change has taken place,  I have tried to install several times. I have uninstalled Ghost 12 and tried to reinstall 14 - same results.  - Running on a Dell XPS 630 with 4 gig of ram.  I have the norton uninstaller program but do not want to run that because of my Nortom antivirus program.  How to I get a refund on Ghost 14 if it refuses to install?