So this isn't exactly my problem, but a friend of mine has it. She's also pretty stubborn about it and refuses to do anything about it.
So a couple of weeks ago she started having issues with her Fujitsu laptop, every time she connected it to the internet it started working really slow, up to the point where it wouldn't even open files or documents. But as long as it wasn't connected to the internet it was working normally. So once day I finally convinced her to take it to F10, a small computer shop in Mozirje (we both live in Slovenia and Mozirje is a smaller town here). They found out it was a small sub-program that caused the laptop to freeze every time it had internet access, they also ran a few anti virus programs and found no viruses. A few days after she got it back it was working normally.
Then about 3 days ago it started freezing again, but only during noon for some odd reason, during morning and evening it was working normally. Now she outright refuses to take it back to F10 to get it fixed.
Also, every time her laptop freezes or if she's just plain pissed off she pretty much beats on her laptop keyboard, slams it shut, opens it again a few seconds after that, hard enough to almost rip off the screen, beats on the keyboard again because her laptop is still not working and then slams it shut again and throws it on her bed.
So now I've been trying to tell her that her hitting her laptop might also be the cause of it as well as her generally treating her laptop like it's worthless. And I've also been wondering what might be the cause for her laptop to act like that.