Try this for windows:
I just went into display properties, settings, advanced. Click on "Displays" tab. Click the monitor you are using. For some reason, the default for me had a maximum refresh rate of 65 Hz. I bumped this up to 120 (my monitor can handle that), and it seems to have not fixed, but improved things. Maybe this setting is overriding the normal windows refresh rate setting? So the bars would have been caused by too high of a resolution combined with a low refresh rate?
Thoughts?