I've just upgraded to Windows 10 again ( 3rd time- I'm a sucker for punishment). My first problem surrounds the search function and although I can key in my search request there is no enter button to activate the search. Secondly I've tried several methods to change my desktop wallpaper but after entering the theme I want nothing happens. It's really frustrating that after more than 30 days after Windows 10 became availability there are still several problems with it. Can anybody help?