I'm no expert on computers, but I use a Mac. My friend uses a PC and he can open anything. My sister has problems opening some files that are not psd files (jpg) on her pc. She is the only person with a pc I know that has that problem.

This pc/Mac compatibility on any file/program/issue is just crazy in this digital word. It's far time the people/companies who make our computers get their act together for everyone's sake.