Acer v5-473p is stuck on Acer loading screen

Ive been trying to fix my loptop for ages already and ive watched and looked at the internet for help but nothing seems to work... its not really stuck on acer loading its more like lagging on the screen becuase after 5 mins its says preparing automatic repair and stays there for another 10 mins.. and when finally finished everything freezes and i cant do anything... please help its been almost a month since this happened to me... this started happenin to me after downloading an application and after double clicking the app the whole loptop froze which never happened to me.... i turned it off using the power button and turned it back on and it became laggy on load screen... i hope someone can help me...