Have you ever wondered how to record all the steps that you went through to get to an error in a program you are using on Windows? There is an app for that! Like, literally, though! It is called Problem Steps Recorder (Windows 7 and Windows 8.1) or just Steps Recorder (Windows 10)
Your computer wont boot past the gray screen with apple logo? Has your computer been acting weird, like forgetting what percentage of power the battery really has, or what type of keyboard you are using and stuff like that? Then you may need to reset your NVRAM or your SMC. This article tells you how.