GMCPhotographics said:
I found that quite sad by Adobe. Considering Win 10 / 8 /7 are all variants of the Vista 64 OS...I don't see why Adobe felt the need to block Vista users.
For the matter, they are all variants of Windows NT, more or less...
The reason to stop support for a given version may be both technical and economical.
Technical, if you want to use new features (even some low level ones that won't be much visible to users), economical if you believe QA - you have to test each version (home basic, premium, pro, etc., both 32 and 64 bit, on a variety of hardware), find beta testers also - and support for a given release costs more than the sales it brings.
Vista is today used by a very small percentage of users (2.9% in the US, according to StatCounter, even less than XP still a little over 4% !), and not only Adobe is ceasing support for that OS, especially since being perceived as an OS used on old systems which may be also underpowered to run latest software (and would also bring a lot of support requests).