Here are my experiences with win10:
I only upgrade my operating system when I have to, usally when I buy a new computer. Or in this case, if it's free. I was happy with win8.1 after I figured out how to eliminate all of the crap and make it look and act like win95. It's stable and quick. I upgraded to win10 and I've only had a few problems so far. Some are specific to IL2, some are more general.
These are my experiences with my hardware and configuration. They may not be relavent to you.
If you are losing your mouse in Il2, you need to first update your nVidia driver to 355.60 released just a few days ago. Then set your desktop to 100%. For some reason win10 scales everything including your apps when you change your desktop DPI. IL2 does not like this. Switch to 100% to start IL2, switch back when done.
If your monitor won't turn off at the time specified in "Power and Sleep", you need to go into Device Manager and disable all of the entries called "HID-compliant game controller". It doesn't seem to actually disable them, (I have the full CH setup) but your monitor will turn off after the specified time.
I might revert to win8.1 before my 30 days are up, but I want to know what the deal is - will I have to pay $200 if I reinstall win10 after 30 days?
Cloyd
Here's a link to the other tread about win10:
https://www.sas1946.com/main/index.php/topic,47683.0.html