Random freezes occuring more often

My computer has been tending to freeze randomly and the screen will look like this
This hasn't started happening untill the last couple of months. I could be doing something and it'll do that, or I could just have skype on and be video chatting and it'll randomly do that. I know that my hard drive may be damaged, but Im not entirely sure if that is the cause of this. If anyone could help, it would be appreciated so I know what Im trying to loko for when Im going to replace the part

Thanks