I have an acer aspire v5-471G. Im having issues booting it keep saying operating system not found or a blue screen errors. So i decided to do a reset using a recovery drive. So everything went right it was on acer logo and resetting x%. So i decided to go out came home after 3 to 4 hours. And my laptop was off. I didnt know what happened so i tried to do it again but now when i press reset it keeps saying "insert your windows installation or recovery media to continue". But my recovery drive is connected. And when i try the refresh. It says something like "the drive where windows is installed is lock. Unlock the drive and try again"