Personally if I were you I would go into the steam install folder where your .WAD is for ultimate doom, then download gzdoom(»www.osnanet.de/c.oelckers/gzdoom ··· dex.html
) it lets you play in a full opengl rendered world. Same graphics/textures and everything else, but lets you use KB+M to play and feels smoother. Or normal zdoom for softwear '3D' like duke 3d used.
As far as updates for windows 8, no idea what to do never heard of this before. I guess you could download DOSbox and try using that somehow,