Re: WIN10 Compatibility Checker
Oddly I have a lot of crap software installed on my main Win 7 PC, and the only thing that got flagged up was a couple of ancient games, and VMware Workstation.
The games, would likely either run in a compatibility mode, or being old so not very demanding, under a Win XP or Win 7 VM. I've played other Win XP only games under a VM on Win 7 without any real issue.
For VMware Workstation, it just stated I needed to re-install after the upgrade. My guess would be it didn't like the virtual network that VMware creates.
Either way...
* Leave it a month for other people to be the first adopters.
* Full system backup (already do this anyway).
* Run the update, and see how it goes, restore if needed.