Ubuntu 14.04 dual Windows 10, unclean file system, hibernate

[oldfred]

As the screen says at the bottom did you press f2 to get into UEFI/BIOS?

If you can boot live installer:
Post the link to the Create BootInfo summary report. Is part of Boot-Repair:
https://help.ubuntu.com/community/Boot-Info

[redmorning]

Yes, I pressed F2 and jumped into the BIOS. I could get into the BIOS before but changing boot order and booting from live USB doesn't work (I explained what happens in this case in post #7 in this thread: http://ubuntuforums.org/showthread.php?t=2317250#7). It was also my repair tool for years.
System says that it can not mount NTFS partition because it is locked due to a hibernate issue; that's what I understand and see in the logs.
What I know till today is when one boots from live CD/USB system doesn't/mustn't check existing partitions but I think this is not totally true; this is where I came.

[oldfred]

If you left Windows hibernated, you have to turn that off.
It looks more like a BIOS install, so you need to use your Windows repair flash drive to restore a Windows boot loader and possibly run repairs.
You can use Boot-Repair to temporarily restore a Windows type boot loader that should boot Windows, but cannot do any other Windows repairs.
Once Windows fast start up is off then live installer or Ubuntu grub can be restored to MBR.

Fast Startup off (always on hibernation)
http://www.tenforums.com/tutorials/4...dows-10-a.html
http://www.eightforums.com/tutorials...ws-8-a.htmlold

[redmorning]

• I created a windows 10 installation USB from official microsoft download site: https://www.microsoft.com/en-gb/soft...load/windows10

• Boot from this live USB

• (Standart Windows Screens) Language Selection->Repair or Install->Advanced Settings->Command Prompt (Order or menu names may be a little bit different)

• In "Command Prompt" I typed
  

  bootrec /fixmbr

  than
  

  exit

• Live USB took me to previous menu. I chose Exit and continue with Windows 10

And voila! (:

Now I need to reinstall grub from "live USB of Ubuntu" to get back my dual system again.

Thank you oldfred, LostFarmer, yancek and all community.