Hey buddy, I've given this a quick google and it looks like this is a windows error related to file permissions. You can try running the extractor (I recommend winRAR) with admin permissions and/or extracting to a different folder location with different security settings. See this link: https://learn.microsoft.com/en-us/answers/questions/1609845/error-0x80070005
Oh yeah! It works! Now that I played the tutorial, missions 1, 7, 8 and 9, I must say that I really loved the soundtrack and voicelines in those missions. Those really help with setting the right atmosphere for the game. My biggest complaint is aircraft handling. No matter how agile any plane is, they all feel almost the same; slow, sluggish, and with an absent of any kind of inertia. So most of the time the dogfights dont feel enjoyable and I really didnt bother shooting down enemy aircraft.
Hey buddy, thanks for giving it a go! Great to see that you like the project so far. Regarding the handling, have you tried limiting speed to the ACM speed window? I tried to put more influence on speed management by penalising mobility at high speeds and giving bonuses within the ACM window. For aircraft like the F/A-18, NRP-20 and I-21, double-tapping and holding brake should also enable supermaneuverability mode which might help in giving that feeling of inertia you're chasing!