Hi Ankit - welcome to PTC Communtiy!
Sorry for the delayed response but we have now uploaded the M100 version on all of the academic download pages. This version should make Creo 2.0 work on Windows 8.1.
You can use this link to download: https://www.ptc.com/appserver/auth/it/esd/academic.jsp
My appolgies, it appears that page has not yet been updated. I have confirmed that the below link does have M100:
Sorry for the confusion!
what is the difference between the two links you provided ?
One has the downloads for Mathcad Prime, Creo Illustrate, Creo Creo View, etc. while the other does not.