Hi all wonder if anyone can help me, i turned on my hp pavilion laptop yesterday and was welcomed with this message ... Boot device not found please install an operating system on your hard disk. Hard Disk-(3F0) i've tried a few things i've found on internet,like changing legacy support to enabled from disabled in bios. That didn't work. tried system diagnostics fix..no luck checked the hard drive cable but all solid and still the same. I don't think the hard drive is shot because if i hit esc at startup go into boot options and select boot from laptop hard drive, it then restarts and says please insert bootable disc..i've tried that and windows starts up only as far as the green line at the bottom then that disapears and i have a black screen with a pointer and that's it. i have tried to repair the master boot record buy installing win 8 onto a usb and then booting from that, the hp logo appears and the spinning circle underneath appears then the screen goes black and thats it, i have left it for half an hour but nothing seems to be happening. any ideas would be great. cheers.