I don't recall any "Windows 2.0", but rather Windows 286 and Windows
386.
Windows 2.0 originally shipped as Windows 2.0, then split into Windows 286
(which was just Windows 2.0 and would run on an 8080) and Windows 386 (which
was Windows 2.0+EMM386)
Windows didn't really have 386 support until 3.0
Eric