I haven't had any serious problems since switching to Win 10.
BlueIris works fine. While I can't stand all the Metro crap, the underlying operating system is quite stable and performs incrementally better than Win 7 did. Besides which, Microsoft will shortly stop supporting Win 7 -- two years from now, you're not going to get any security updates whatsoever.
Some tips to make Win 10 work better:
-- Classic Shell:
Classic Shell - Start menu and other Windows enhancements. A must-have, and it's free. Removes (hides) Metro and makes your desktop & start menu look like Win 7.
-- Windowblinds:
WindowBlinds : Software from Stardock . Lets you "skin" Windows to, among other looks, restore the Windows Aero Glass appearance (I can't stand the flat style Win 10 introduced; looks like Win 3.1 to me). This is just cosmetic, and does cost $10 or thereabouts.
-- Hide Cortana. You can't disable it, but you can easily Hide it by right-clicking the taskbar, select the Cortana menu.
-- Do not try and upgrade Win 7 to Win 10. I did so (on four machines), and each one had issues. As has been the case for thirty years, a fresh clean install is your friend. If you upgraded your Win 7 license key when it was free, your key has been registered with Microsoft and Win 10 will activate without problems.
-- No idea how good or bad Windows Defender is; I always recommend going with a mainstream third-party antivirus & firewall. I use Norton, which was re-written a few years ago and no longer hogs system resources.
I can't verify whether Win 10 is "connecting to places it shouldn't"... conspiracy theories aside, I personally don't care if it's calling home to Microsoft and/or updating itself. Rightfully so, Microsoft is tired of dealing with people who won't/can't update their machines, and then complain when said machine gets turned into a zombie server for some Ukrainians. Therefore, they've made the update process (and metrics collection) transparent. /rant off
Again, to reiterate, I haven't experienced any functional or reliability issues switching to Win 10; my system is very stable. BlueIris works as well as it always has (I run it as a service).
Scott