I have the latest Win10 1809 version, and what I think is that latest development build (the one from one or two days ago with all the stuff fixed), and I recompiled a bunch of programs, and all seems fine. That's on both of my PCs.
Oh, speaking of virus check software:
With McAfee, it takes a long time to download qb64 from the repository, because it seems to spend a long time checking the first few bytes. Then suddenly, the download is fast.
Just recently, with Defender (which I use on my Dell OptiPlex), after the download is complete, it also spends a lot of time checking it. So now, no matter McAfee or Defender, it takes about as long to complete the download. Used to be until recently, Defender didn't take up any time at all. It only asked whether you truly wanted to run this new executable. Must have been a big heuristics upgrade to Defender. All for the better, I figure.