Hey guys, my fathers laptop which he uses for word processing at work died. He's had it for a year and a half. He told me during a power point presentation the laptop gave him a memory error. He can't recall what type. He then shutdown his laptop. He tried to turn it on again and it will not load into windows. It gets to the HP screen where I ran a system diagnosis and everything is fine. But when I want to test the hard drive it says harddrive does not exist and boot device not available. He told me before this happened nothing was acting or playing up and proper ventilation for the laptop was used. So, I'm thinking either the hard drive has died, or a connection has come loose within the machine. What do you guys think? Luckily he bought 3 years of warranty, but lots of his teaching data is on that drive. He backs it up regularly but some important files (a week old) are still on there. It's a Hp Pavillion DV6 not sure what model. EDIT: After taking the battery out it seems to have booted to windows. I might run a quick hdd test to see if it's healthy..