I have updated my Graphic driver to AMD (Catalyst 15.7.1), then when I opened AutoCAD 2015 it gives me the following :
Error: "The application was unable to start correctly (0xc0000142)".
then, I tried removing AMD drivers and Autocad opened successfully.
Some specs on this machine:
Dell Inspiron 15R 5521
Windows 8.1 Pro. 64 bit OS
Intel Core i5-3317U CPU @1.70GHz
Dual video: built in Intel HD Graphics 4000 and AMD Radeon HD 8730M.