My Toshiba Laptop Is having a similar problem. It started a few days ago where whenever I log in either normal mode or safe mode, after a period of time of opening the browser or sometimes opening nothing at all.. My computer doesnt respond and then freezes and I have to restart it by holding power button.
I have already uninstalled my main browser firefox, and I am now using Internet Explorer and the problem has not changed.
I seriously need to get this fixed, as I have not had the computer that long and need it for studying.
Any help? Thanks in Advance.