I too was thinking of making the change to
org-get-x-clipboard-compat instead, but somehow decided not to. It calls x-get-selection and the latter, while it does have w32-specific flavor (in w32-common-fns.el), doesn't seem to support clipboard and its primary purpose is stated as "Fix interface to (X-specific) mouse.el."
As far as org-no-properties goes, I don't think it will make any difference on Windows because it looks like only plain text is supported (see e.g. http://www.mail-archive.com/address@hidden/msg03026.html and the code in http://git.savannah.gnu.org/cgit/emacs.git/tree/src/w32select.c) anyway. So it is hard to say where the patch clearly belongs (w32-common-fns.el (x-get-selection) perhaps?). I can move it to org-get-x-clipboard-compat of course but some change would still need to be done to org-get-x-clipboard because it checks for (eq window-system 'x) explicitly. Let me know what works better.
Thanks
Alex