3ds studio
You need a math coprocessor to run 3D Studio. You probably have a
486"sx" (or worse yet, a 386). For the former, you need to get a real
486 (DX). If the 386 is what you have, just get a matching 387 (it
should be at least the same clock rate as your 386).
Now, if you have a math co and still get that, beats me…