Hi i have a alfawise z28 pro box (runs on 7.1) .I would appreciate some advice on updating my box. Can it be updated ?and if so where do i find the firmware .The updated 8.1 model seems to run a lot better than mine ,i dont seem to be able to run a upto date version of youtube (signs me in but when i try to play a video it throws me out so i have to load a earlier version).Any help would be gratefully appreciated.