FelixPls1

So I got this old Pionex computer back in December. I tried to dual boot it with NT 4.0 for some reason, deleted the whole OS by accident, reinstalled it, and now, it's stuck with 16 colors and a 640x480 resolution! I've tried everything, from drivers to SciTech Display Doctor to reinstalling it yet again, but nothing seems to work It only goes into true color when I open up a DOS application