Window 10 is DEAD and how to COLD BOOT !        

No more windows login screens happen and BSOD's now: Blue screens, of death. ( You know the HDD is not dead, tested it, it is just a sick Windows 10)
The key problems with W10 is the missing F8 hot key (off by default turn it on using this)
The 2nd key fact is the W10 does not cold boot,  it actually DE-HIBERNATES, only. A.k.a.  Quick boot or FAST STARTUP, feature (default)
This Quick boot can be called Quick death.  (and the reason this page below exists)
The PC  boots from a mirror image in the hiberfill.sys (a huge hidden file in C:\ (root) ( a cold boot real does not do that but warm boot does, by default)

This page is about Dead Windows 10, and all you can get is blue screens of death. (and endless useless auto recover mode screens) Please do not reload W10 yet. OKAY?
Remove all USB devices ( they can have corrupted drivers , so remove all that USB stuff)
Remove all USB devices. (even keyboard /mouse) and if  a laptop remove the bad main large battery. Still failing? yes, then proceed.
There  are other cause can be wrong video card driver. (only if you played with that , can that happen)
On easy way to land here is BAD RAM (DDR), (best is to test RAM in safe mode, 1 stick at a time, until sure RAM IS OK)

This page below is not about hardware failure (or was and corrected as in MY CASE) nor about black screens of death.

The PC will show a sad face screen in blue, (blue is the only clue it is a Microsoft window, popping up)
The next screen (you boot  2 to 3 times see if you get the below) Windows has no default F8 safe mode key, like w95 to W7 had, but does have this.

(It is only 3 clicks, this is #1)  THIS IS Auto recovery mode. Click See advance button.
This above took at least 2 boot fails  to land on the auto repair mode, in W10 (there are 3 ways to get to advanced, the above,  the Boot w10 install media and the F11 key that HP provides)
Press advanced and get. (or go there from the F11/or install media) to here.
There are 6 choices here.  In my cases below, the Startup Repair fails (that is because W10 is dumb, and can't even do a cold boot in this process, but WE CAN !)

Click the RED box. above, yours is not RED just the ABOVE IS FOR CLARITY.
Line 4 is the new W10 Safe mode.
See the above, now you now know where those geeks and MS hide your F8 key, it's gone now but moved here. (W10)
In my case I click safe mode then Restart and WINDOWS now works, I then reboot hard shutdown and  start over and my PC now runs like new, (the SAFE MODE deletes the hiberfill.sys data old )!!!

Nothing beats EXAMPLES:
My PC failed due to my SATA3 (6g) PCI-express card died, (put in new one) and guess what, the hiberfill.sys file is now corrupted. (a W10 feature that, but can be turned off)
The old won't boot jive. (DEAD PC) say the SATA card died and was replaced ! OMG hiberfil.sys is bad. ( In most cases is HDD early death or the C:\ SATA chip bad) {or bad RAM}
The other bad thing  is in safe mode the Control panel power applet, is dead, when lauched , all advanced modes are grayed out, cute no? (sarc off)
Get that clear,  in Safe mode I can't turn off, hibernate.
(Do this now or do it for life, your choice)
FIX #1,  In command prompt, you can in fact set legacy F8 back on, using command #1 below.
Cmd.exe (in run box type this) and run as ADMIN (called an Elevated Command prompt or the command  fails)  {It will say successful of is}
  1. bcdedit /set {default} bootmenupolicy legacy
  2. bcdedit /set {default} bootmenupolicy standard
 Reboot the PC and, hammer F8 key, just like you did for since windows 95, but is disabled in W10 for some odd reason, but not now, we just cured that.
Photo of F8 working after above Red command is issued
No kidding it WORKS !
Next time Windows 10 , BSOD's and goes to recovery endlessly, this will fix it.... Pretend, F8 key is , a TRUE COLD BOOT that repairs the hiberfill.sys corrpution, and does.

Method 2:
HP year 2006 and newer the F11 key ,takes you to recovery mode (hammer the f11 at power button ON)
Boot to windows 10 install DVD or stick (called install media now)
Then pick
Troubleshoot > Advanced Options > Startup Settings.

Command prompt fixes:

Don't forget command prompt mode above. and the below fixes in hand typed command line , users commands.

By opening an elevated command prompt (or above recovery page) and typing
Powercfg /hibernate off  (enter key)
These setting ,are global to all accounts.

Fast Start up or (aka QUICK BOOT ) (A 2 Second gain is worth this ?) But this fails as WINDOWS IS DEAD NOW it also fails in safe mode, oops?)
Disabling "Turn on fast startup" FIXED the problem for me :) Just go to Control Panel > Power Options > Choose what the power button does and uncheck the "Turn on fast startup".

This forces cold boot on , Fast start is off and hibernate off.)
and no more hiberfill.sys, MIRROR boots and fails. again.

powercfg -a      (full status message , only, and  does nothing to pc,it is a passive query.)

powercfg -h off  (means diable hibernate modes)
powercfg -h  on  (avoid using hibernate)

powercfg /h /type reduced  (reduces the file by half)saving ssd space.

To make W10 more fun and internesting (scar off) They moved lots of things out of control panel and in to settings. (I click settings, then power)
Click change, first, to ungray the below options.
Then uncheck "Turn on fast startup."  (this makes the boot slower but no more BSOD'S from the corrupted hiberfil.sys file again.

Enemy #1 ( If hiberfil.sys  gets corrupted (its not hard to)  The OS will not boot, and the recover mode fix startup repair files, fails to fix this simple common failure. (wake up MS)

If in a panic, you might try deleting,  hiberfil.sys,  and let W10 find that and force a DEAD COLD BOOT. (even  a Linux boot DVD/Stick  delete it !)  {not tested by me, this delete action}
In the old days, we could delete all 3 sys files there and the OS would just rebuild them... (The OS sees it missing as the dirty bit, true and does a rebuild)

Ok you are not booted to Windows 10, if not, the PC has hardware issues.

version 1.  10-7-2017