I was playing the game a few days back when I noted the game suddenly going into Windowed Mode while in the middle of a sortie (went from full screen to running within a window pane).....didn't bother the game any at all & all game functions were operationally sound.
I had noted this occurring a few months back but didn't put much thought into it as I hadn't witnessed this happening since, but seeing this again this triggered me to get out the game & check Windows to see what other app\program had signaled Windows to start while AHIII was running...............
And the culprit is.............Windows Update!
Got me to thinking bout why as I had set this up to run on startup to get all this out of the way to exclusively stop this from happening......
What Windows was attempting to do was download\run the Windows Malicious Software Removal Tool September update (KB890830) while AHIII was running so it moved the game from full screen mode to windowed mode to facilitate this activity.
I had also just got done swapping out some hardware which required removing\installing drivers so this may have prompted Win 10 to call for this update.
So far I haven't seen this reoccur since..............as before.
Interesting to say the least................