Thanks Seabass. It seems to be the Trial that stops working in Vista64, after any type of reboot. In another thread, someone mentioned that maybe it's the Trial screen that pops up right away, or something related. Regardless, the problem is not present in the Pro version (for any future readers).
Thanks Cypren. I took the plunge, bought Pro, and indeed it works without issue so far on Vista64 as the primary, even after the reboot test. :HOT: Such a great app, I'm glad to be able to use it with this OS setup.
A number of people have reported this with Vista 64 (using the Trial) as the primary. I have the same issue with UAC turned off. Is there any confirmation that MP Pro indeed works using Vista64 as primary? What about running MP in VPC with XP? (Enough acronyms for ya? :) ) I'm tempted to take the plunge, but curious if anyone has already tested this with success. Regards, Jake