Vista 64. Wasted hours now doing everything i could think of. Over 24 hrs now with no response from support. Am I reading that it wont work with my OS? Not what sales tells you...But today, its like I'm banned from MB's site. Everything with their name in it won't load. Firefox, Chrome, doesnt matter. Had an old piece of a 1.xxxx version, in there I deleted. Thinking AVG was blocking in it, I uninstalled it: mistake. now I have nothing. Bought 3 licenses, got in phone and laptop ok. Not pc. Only thing I can think of: forgot i had free version already on laptop, came downstairs and thought I'd give it a whirl on the pc. no go. Bought in next am, but still get nowhere.