Let me first start off by saying I have limited knowledge on PCs. I was browsing the internet when out of nowhere it started acting up. McAfee popped up in the bottom of the screen and my laptop began lagging pretty bad. Well it got stuck at that point with absolutely no response to any commands so I powered it off. When attempting to power back on, it loaded about 2/3 of the way on the welcome screen, and then froze at that point. It repeatedly does this. Upon hitting ESC, it says that my system BIOS are shadowed and my video BIOS are shadowed. Can anyone help? Thanks in advance.