Pro Audio 9 and Windows 10

Hi everyone greetings from Italy,
 
   after some (a lot) of years, I decided to use again Pro Audio 9. Last time I used it, I had XP on my laptop and now I got Win 10 (64bit). After the installation wizard is completed, I launch the app but I cannot use it: the app is locked and there's a message saying (in italian):
 
"Impossibile aggiornare il registro di sistema.
Provare utilizzando REGEDIT"
 
In english, that should be something like this:
 
"Cannot upgrade Windows Registry.
Try using REGEDIT"
 
Is there someone who can help me fixing this thing or has already had this kind of problem? Thanks for any help you'll provide.
 
Note for the mod: if there's already a thread like this, please forgive me but I didn't browse the forum in the appropriate way.
Thanks again!!!!

If you haven't already done so: Before doing anything, right click the setup file and set it's compatibility mode to the last known working OS (XP sp3). Once installed do the same for the Cakewalk exe files.
 
Since you've already installed it, I would 1st uninstall it and clear the registry of any Pro Audio listings (delete them).
 
I have installed several old programs this way and they work reasonably well with only minor glitches here and there.