Surface pro 3 freezes permanently doesn’t recover

My sister have got a surface pro 3 and complains that the screen and in fact entire surface 3 freezes. As for as I know this is not related to performance issue because I am strongly believing that i3 core is sufficient for Microsoft word document editing tasks. Is my thoughts have any ground? Why do a surface pro 3 freeze ? Are there any other complaints in the latest surface pro 3? Is it related to any faulty app or driver? How to reset the surface pro 3 when it hangs? Taking to service centre is simply not feasible
