Just a shot in the dark here, but isn't this a "known" issue which affects certain video chipsets???
...and just to clarify, by "known" I mean I have read/seen this type of issue being described in numerous forum posts in the past...
On a personal note, here is what I'm seeing with ATI X850 XT PE video card (yesss....some old stuff here, ha ha...): Windows DOS simply does NOT work, the frame pops up, but no command prompt ever appears, switching to full-page results in a blank full-screen. I normally have to kill the session.