I have a Toshiba C75D with AMD Radeon R5 Graphics. I upgraded to Windows 10 yesterday. I read where the Radeons will not function properly with 10, and it happened to me. It broke the extended desktop. I do powerpoint presentations and needed to extend. I didn't want to update the drivers to Cataylst 15 because it looks like some folks have been having problems with the new drivers. Does anyone monitoring this forum from AMD know how they are progressing on new drivers to address new issues. I rolled back to Windows 8.1 until better drivers come out.