First thanks of you all. many times I've got answer here.
I'm an ordinary linux user. For 2 years I had win8 and then win10 with Linux Mint 17 & 17.2 together. There was any problem to boot by Linux Mint boot loader for both.
I have got an Acer laptop, i7, HDD 1tra, VGA 2G, RAM 16G. And installed Linux in different partition of Windows. Indeed from end of Hard.
I decided to install Debian Jessie instead of mint so downloaded "debian-8.5.0-amd64-DVD-1.iso" from site & made a bootable CD by it, but had to install twice it.
In first installing, for where Master Boot Recorder should be installed, there were two choices: 1) manually 2) ata ...
I checked the first choice (manually) but decided to back & marked second choice (ata...) because thought this is complete of hard & is better choice. after boot I noticed there isn't Windows loader in boot text. I search a little and didn't get any response but grasp that Windows loader partition is first one of Hard.
So again installed Jessie & this time chose /dev/sda1 for MBR. Sadly the result was the same. In new search encounter this command: "update-grub" , a hope light! So manage "source.list" for repositories & did these first commands:
sudo apt-get update sudo aptitude update sudo apt-get install build-essential sudo apt-get install linux-headers-$(uname -r) and hopefully typed "update-grub" & result was: Generating grub configuration file ... Found background image: /usr/share/images/desktop-base/desktop-grub.png Found linux image: /boot/vmlinuz-3.16.0-4-amd64 Found initrd image: /boot/initrd.img-3.16.0-4-amd64 Found Windows Recovery Environment (loader) on /dev/sda1 done
Really got happy and became better when I saw "Windows Recovery Environment (loader) (on /dev/sda1)" after reboot, but unfortunately does not work!!
When I choose it by arrow keys & Enter, the page return back to itself & nothing happens. It just boots Debian.
I'll be so thankful to to listen your guides.