Basically the screen freezes and a last sound loops. The same happens with windows 7 for some reason. Do I have to reinstall Ubuntu or just check the computer?
Well I can't really do anything with the laptop after it freezes like that, I can't use the mouse nor the keyboard. Freezes happen at a random times but most commonly when there is a YouTube video playing in a firefox browser. This laptop uses the newest ubuntu but it says that there is no available drivers for current graphics card so I guess it uses pre installed open source drivers but I don't really know. Ubuntu was installed from usb boot drive but i also have installed Ubuntu on my pc from the same drive and everything is working fine. The graphics card is Nvidia gforce gt 335m 1gb.