Grub does not see Windows7, what should I do?

Question

linux

Windows7 was installed, which I used for quite a long time. Wanted to learn Ubuntu. Because it was impossible to destroy the Old and until I deal with Ubuntu, I decided to leave Windows just in case.
The breakdown turned out to be crazy, but there is no other way (
here is the result of fdisk -l

sda1 - /boot/
sda2 - my E drive in Windows
sda3 - windows
sda5 - my D drive in Windows
sda6 - swap
sda7 - /
sda8 - /home/
grub-update did, but he does not see Windows. Only ubuntu and 2 memory scans appear.
Installed the boot-repair package.
Tried to restore the MBR of Windows, but after that this thing came out bypassing the hornbeam:
BOOTMGR is missing
Press ctrl+alt+del to restart
log: LOG
Everything came back after choosing the recommended boot-repair options. Log from boot-repair: LOG
Please tell me how to make ubuntu and Windows7 friends in my situation. The whole day was swaying and nothing happened.

Answer 1

All the proposed options did not help ((
I had to re-partition the screw and install everything normally, sequentially.

Answer 2

Normal practice;) the sequence of actions is as follows-> restore the Windows bootloader (you need a Windows image for this) after that Windows will boot, after that you restore grub using live-cd ubuntu

Answer 3

Maybe it will help

sudo -s
apt-get install os-prober
update grub

Answer 4

These are standard issues that are associated with the MBR and various flags.
If you want to quickly and easily fix the problem, download Ubuntu and install Boot-Repair:

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo sed 's/trusty/saucy/g' -i /etc/apt/sources.list.d/yannubuntu-boot-repair-trusty.list
sudo apt-get update
sudo apt-get install -y boot-repair && (boot-repair &)

If you need details, please refer here: Boot Repair

Answer 5

Add to /etc/grub.d/40_custom , (or create, for example, 50_windows)

menuentry 'Windows' {
  insmod part_msdos
        insmod fat
 	insmod ntfs
        insmod ntldr
 	set root='hd0,msdos1'
        search --no-floppy --file --set=root /bootmgr
  ntldr /bootmgr
}

update-grub

Answer 6

Most likely, you have UEFI / EFI. I had this after installing Linux in parallel with Windows 7 on EFI. Grub just didn't "pick up" the right entry.
In Linux, do in the terminal, sweat as a root:
~# update-grub
~# reboot
If the desired item does not appear in the list of systems, we continue. Execute as root:
~# grub-probe --target=fs_uuid /boot/*/*/Microsoft/Boot/bootmgfw.efi the
output will be your Windows disk ID - write it down on paper
then execute (I use vim if you are not familiar with - any other console editor:
~# vim /etc/grub.d/40_custom
and at the very end, after all the comments, add a new line:
menuentry "Windows x86_64 UEFI-GPT" {
insmod part_gpt
insmod fat
search --fs-uuid --no-floppy --set=root YOUR_PAPER_ID
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}
Then run as root:
~# update-grub
~# reboot
Profit!

Answer 7

so that you can’t stand your brain too much: https://help.ubuntu.com/community/Boot-Repair