Just tried again for fun -- still doesn't start for me on Windows 10. Not from batch file, nor on its own with any command arguments.
And that's with two different Windows 10 machines, one AMD Ryzen 7 1700, one intel i7 3770. Both with a GTX 1070.
Any way to debug this? I don't have anything strange running at the same time, as far as I can tell.
Just to confirm -- did you turn off windows defender? Windows Defender sometimes would deny the execution.
What happens if you directly click on bminer.exe?
Yes, I had tried disabling Windows Defender, despite it showing no indication that it cared about bminer.exe. Disabling Windows Defender had no effect.
If I double-click bminer.exe a cmd-style window appears for a couple seconds, then closes. It has no contents. There are no error messages or other outputs.
EDIT: same result with new 5.2.0 version.