bootrec not recognized by command prompt

Mike, I assumed you were doing these repairs from bootable media which is more stable than the onboard repairs that might have corrupted files.  It is one of the first things I recommend in the tutorial covering everything to get Windows 10 started.

To create Windows 10 Installation Media on another PC install Media Creation Tool and follow the directions here:  http://windows.microsoft.com/en-us/windows-10/media-creation-tool-install.  Uncheck the box for Recommended Settings to choose the exact version and bit rate for the target PC only.

 Insert media, boot it by powering up PC while pressing the BIOS Boot Menu Key: https://www.sysnative.com/forums/hardware-tutorials/23010-bios-boot-menu-f-keys-hotkeys-system-manufacturer-oem.html

If the media won't boot you may need to enter BIOS/UEFI Setup (pressing key given in chart in link above) to turn off Fast Boot or Fast Startup first.

Choose the boot device as a UEFI device if offered,  on second screen choose  Repair Your Computer, then Advanced Troubleshoot Options, then System Restore.  If that fails try the RebuildBCD commands from Command Prompt.   If that fails go back to Troubleshoot Options to try a Reset. 

If that fails choose Install Now, then Custom Install, then at the drive selection screen delete all partitions down to Unallocated Space to get it cleanest, click Next to let it create needed partitions and start install - this makes it foolproof.   Everything needed to get the best possible Clean Install is here:  http://answers.microsoft.com/en-us/windows/wiki/windows\_10-windows\_install/clean-reinstall-windows-10-upgradefactory-oem/1c426bdf-79b1-4d42-be93-17378d93e587.  It  is a better install than any amount of money can buy and a great learning experience that will make you the master of your PC because you will learn what works best and how to apply it with your own hands.

Mike, I don't think you tried everything I suggested because usually something will work. What about the rescue install, or all of the other steps in Troubleshooting Windows 10 Failure to Start:

http://answers.microsoft.com/en-us/windows/wiki... ?

I have released the thread so others can answer but there are very few who can rescue installs this damaged. Almost anyone would advise to Clean Install. But I have kept it as the last resort.

Mike, please read what I wrote. I said that BCD commands don't always work.

For that reason I gave you earlier a way to do a rescue install that will often replace the boot manager with a new one to boot your old install. Did you read it?

Then I also gave you a Clean Install to look over in case you want to do it in the future.

Good night.

No, 500mb is plenty. Most System Reserved are 100mb. Was it preinstalled at Factory? Have you done a Clean Install yet?

do I need to extend its memory by typing "extend size=" or 500 mb is enough?