When i tried to turn on my laptop i got the black screen with two options: start windows 7 or do the memory check (or something like this). I did the memory check and it showed a "hardware problem". After, when i logged into my windows 7 i noticed everything seemed fine. But after trying tobrowse internet i realized it was everything but. My cursor was moving by itself, i couldnt visit any website because it wouldn't stop changing the pages.... The same thing happened when i tried to acces my files or photos so it' s not only web related. What could be the problem?