No, I'm saying HP has a diagnostic utility called HP Unified Extensible Firmware Interface (UEFI) Support Environment - but that's too much to type every time
I've tried to get UEFI on my dv6, but you need firmware that supports it, HP doesn't open up the firmware they make available on most consumer machines.
Just think diagnostics when I mention HP UEFI.
So how abut the other things
- having only the Win8 HDD in the machine and posting a disk management shot
- remove the laptop battery, AC power and reset CMOS
- Cleaning the keyboard
- answering the question about a small power button (Quickweb)
- replacing the CMOS battery
Chapter 4 of the service manual
Read the guidelines, cautions, and other preparatory information before beginning.
Here's the page relevant to the CMOS battery (aka RTC, coin ...)