O.S. NOT FOUND

ok so i updated the firmware in the hp pavillion 570-p000 and after that i have no display, and it will not boot or really do anything. i get power and i have trouble-shot the hardware inside the pc so im left to believe the bios is corrupted. here is a link for my pc--...

Hello! I have recently found my 2 year old Seagate FreeAgent Go external hard drive (1TB). When I plugged it in and tried to open it File Explorer kept crashing. Eventually it went through up to a stage where it gave that message: "F:\ not accessible. The parameter is incorrect." What should I...