Hi, my acer V3 551 laptop is not starting up. It doesnt go past where the Acer logo pops up and sometimes a text would appear below it saying "diagnostics are running" and it would take an hour for it to run the diagnostics. After that it goes to a window where it gives me the option to either refresh or restore my pc or to shut it down. i tried refreshing but it gives me an error. I cant seem to get my head around this problem as it has never ever given me any problems before and now all of a sudden this. ill really appreciate any help on this matter