Until 8.2.2, you could not install AC on Win10 (perhaps it was a later version of Win10?)
That being said, I just started playing around with AC on Win10 and it seems to work OK.
Interesting that you have been invited to get in line. I have not seen this yet on any computers, but supposedly upgrades from Win7 on up will be free for everything but enterprise. Apparently, one thing I read is that upgrades are small potatoes for M$. But it will make everything much simpler to have everyone on the same version. Apparently upgrades will only be free for 1 year. This version requires upgrades, no pick and choose. It apparently also will not allow dual booting with 2 operating systems since this has been one method of hacking windows.
For the most part Win10 is fairly stable. I have seen a few glitches but it is a beta program. I have been using it on my laptop for lightweight things for almost 6 months. Again, I was just able to install AC from my laptop to my home computer with a test database last week. Speedwise, it seems about the same as Win8.1. The official version is supposed to be out before the fall (late July was the last thing I read.)
Take your time about upgrading. Use a inconsequential machine (or even one that has XP on it) and download a version and play with it. When you are comfortable with the differences (it's a blend of Windows 7 start with Windows 8 start/store/apps) consider whether you will upgrade.
