Ubuntu – Grub menu not showing at boot after upgrading to Windows 10 in dual boot

bootdual-bootgrub2windows 10

I have installed Windows 7 and Ubuntu in dual mode in different drives. I replaced Windows 7 with Windows 10. Now only Windows 10 boots; it's not showing the Ubuntu option at boot time.

How can I solve this problem?

Best Answer

First boot to Windows 10 and disable Fast Startup. Here is a tutorial to do this

Now you need to have live boot Ubuntu (like the way you did when you first installed Ubuntu). You need to have a working internet connection for this.

After you boot to Ubuntu you need to type these commands in terminal line by line:

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

After Boot Repair software is installed it will launch automatically. Then click on Recommended repair. Now reboot, if everything goes fine you will get option to select OS of your choose when you start your computer

Related Solutions

Ubuntu – Windows 7 and Ubuntu 13.04 dual boot, GRUB menu not showing

Boot up a live usb and try to repair the bootloader with these commands:

sudo add-apt-repository ppa:yannubuntu/boot-repair

sudo apt-get update

sudo apt-get install boot-repair

After installing 'boot-repair' launch this program from dash by searching for the term and click its icon to launch it.

If this doesn't work then boot into Windows 7, download and install a freeware called 'EasyBCD' (latest version is 2.2)

After installing this tool, select 'add new entry' column and install grub under the Linux tab.

Sorry I'm on my phone now so I can't add links and pictures to the post. I'll surely edit this post today when I get to the house

Hope this helps.

Dual Boot Issues – Fix PC Booting Directly to Ubuntu Instead of Showing GRUB Menu

I really dont know a lot about Linux, but i fixed the same problem by:

Check if grub is installed

grub-install --version

or even

sudo dd bs=512 count=1 if=/dev/sda 2>/dev/null | strings

If it is installed, probably he is not recognizing windows boot, so it directly boots into ubuntu and wont show the grub screen. So, if your windows boot file was not deleted, this should make grub appear and recognize windows as a boot option.
```
sudo -H gedit /etc/default/grub
```
Insert # at the start of the line GRUB_HIDDEN_TIMEOUT=0.

Now save then run:
```
sudo update-grub
```

This should be fine to make Grub menu appears on every boot.

( Grub menu won't show on dual Boot )

Best Answer

Related Solutions

Ubuntu – Windows 7 and Ubuntu 13.04 dual boot, GRUB menu not showing

Dual Boot Issues – Fix PC Booting Directly to Ubuntu Instead of Showing GRUB Menu

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