What are the Requirements for Fullscreen Consoles in Windows 7?
Solution 1:
As suggested, I'll post my comment from earlier as a separate answer:
The problem is that the new driver model does not support VGA text mode programs. Whether those are 8, 16, 32, or even 64 bit doesn't matter. I don't know if any of the old VGA modes in fullscreen are supported, actually. See support.microsoft.com/kb/926657
The major thing to note is that this is the fault of the driver model, not the graphics capabilities of the card. Virtually every single graphics card out there supports the basic VGA modes, both standard VGA and at least some relatively common subset of VESA modes. I do not really know anything about the reasoning behind Microsoft dropping that functionality—it's not like motherboard vendors or graphics card manufacturers are going to all of a sudden decide to drop support for VGA.
(Also note that virtually all modern cards in their native modes are not VGA, but a completely different thing. They just all happen to speak the set of base VGA standards.)
Solution 2:
just go to device manager
display adapter
select your graphic card right click it
and disable it
that's all
all dos program work in full screen frm now on when you want
you can enable it again when ever needed.... :-)
Or you can use WMIC command, after using it you will see maximize button is enable in window but I never worked in that environment.
Solution 3:
The new DWM isn't compatible with full screen 16 bit programs.