Tried searching, but found other irrelevant threads. In DOSbox my right Shift key does not work and the [ key does not work. The [ key is moved over to the ] key and the ] key is moved over to the \ key. (On this computer, these keys go from left to right [ ] \ above the enter key.) Needless to say I have no \ key now which means I can't easily get to a different folder. And yes, as soon as I get out of DOSbox all the keys work fine.

Is there a known fix?

Great job with DOSbox by the way. I got my hands on some very useful old software and DOSbox is exactly what I need, if I can get around this issue.