I had a MacBook for about a year now and a few weeks ago I started having problems with videos from online (ex. YouTube). They would start loading and stop, on and off. It would load about 2-3 seconds of video every few minutes. So I reset safari and everything, that didn't help. Anyway, I got a MacBook pro last week, and I transferred everything from my MacBook to the MacBook pro via ethernet cable. I am not experiencing this problem on the MacBook pro since the transfer. I reset safari again, no help. Have had friends use their computers on my wifi network, they all work fine. My speeds are over 10mbps. So my question, I don't want to erase all of my data, as I have no means to backup my iTunes library which is huge and all my documents and such. Is there a way to go back to factory settings though? Like should I reinstall the OS without erasing my data? I have not installed any 3rd party apps except skype. And this problem didn't appear until months after that. Everything is completely up to date software version wise. Any help would be greatly appreciated!