My laptop running windows 7 won't even go to the advanced boot screen. It shows the toshiba startup screen, and pressing f2 or f12 works but nothing else. F8 only leads to beeping. Not pressing anything leads to a blinking cursor on a black screen. What led up to this: The laptop restarted out of the blue yesterday. No big deal except igoogle homepage no longer worked. MSE told me I needed system security sweeper. Having no blank disk onhand I delayed. This morning after 1/2 hour or so it restarted only to not properly boot. I'm a noob here, posting from my phone. I appologize in advance for any typos or forum faux pas.