I just bought a new 'puter with W8 on it. That is another whoooole story........ I downloaded DraftSight and it is fully compatable with W8. I'm told DS has the same commands a ACAD. DS is a free download so to try, is the right price. This comes from somebody that knows less than nothing about CAD. I was sucesfull in using DS to trace over drawings of a Kraft Super Fly and am currently in the (1/4 scale) build mode.
Ken
http://www.rcgroups.com/forums/showthread.php?t=1956662