I'm kind of tired of my Macbook messing up. It's already had so many problems with starting up. Anyway, enough of that. Lately, it's been really weird and really laggy at times. Sometimes the internet will stop working although the wifi is perfectly fine and the internet works on my other laptops. And the only way to fix that is to restart my laptop. Well, it happened again, and now it isn't letting me start it up fully. I'll turn it on, and it'll play the start up sound and show the light gray background with the gray apple, but then the apple turns into a "no" sign like this . As I'm typing this, the "no" sign is now gone and it's just the light grey background. The fan is really loud too. I hope this isn't a huge issue... I don't want to get a new harddrive again I'm so stupid, I never backup my files. If you guys have any tips, that'd be awesome! Just to warn you, I'm REALLY dumb with technology so please use common English when explaining.