Can't boot Windows 7 after installing Ubuntu
Run fdisk -l
on terminal to check the windows partition.
If you found it, then type update-grub
Then reboot
And you will able be able to choose your selected OS
If permission is denied on running fdisk -l
alone, add administrator privileges by entering you password after writing this code into terminal sudo fdisk -l
I had the same problem! After starting the computer the GRUB Boot loader displayed UBUNTU and 2 further entries but not Windows. After long trying I succeeded by performing the following steps:
- Find out on what hard disk and what partition WINDOWS is installed.
This you can do after opening a terminal and type at the prompt
sudo fdisk -l
(this must be done with administative rights, so you will be ask for your password). You will now get a table of your partitions with device names like
/dev/sda1
,/dev/sda2
.. and so on.
If you have installed windows it might have type NTFS
. This means if the second entry in this table is like this:
Device...Boot.....Start...End......Blocks......Size .........Id.....System
/dev/sda1..*...2048..467118879..467116032..222,8G ..7.....Linux
/dev/sda2 ..467118080...961144831....494026552..235,6G 7.....HPFS/NTFS/exFAT
/dev/sda3 ..1270138878...1953523711..341692417..7,6G 5.....Extended
/dev/sda5 ..1270138880...1945182207..337521664..7,6G 83....Linux
windows is installed on the second partition of the first hard disk (sda2)
(In my case both operating systems were installed on one hard disk with 2 partitions, on the first I had installed UBUNTU and Windows 7 on the second. ) Press C for accessing the GRUB command prompt. At the Grub-Prompt enter the following 3 commands:
Grub> set root=(hd0,2)
Grub> chainloader +1
Grub> boot
Notice: In the command set root = (hd0,2)
after hd
type the (zero-based) number of the hard disk (here 0
) and after the Comma the Number of the partion (here 2) . If your windows partition is sdb1 you must type set root=(hd1,1)
if it is sdb4
type set root=(hd1,4)
etc…
Now Windows should boot!
Now you might want to have Windows 7 permanently as a menu item in the GRUB Boatloader menu. This you can get as follows:
menuentry 'Windows 7' {
set root=(hd0,2)
chainloader +1
boot
}
Save the file and close it.
Open a terminal and type on the command prompt:
sudo update-grub
After restarting my computer I got a further entry with windows 7 in the GRUB menu, so I can chose between Ubuntu and Windows.
First, restart your PC or laptop.
After restarting you see the Grub menu. Select Advanced Options for Ubuntu (with the arrow keys; press Enter to confirm).
In the Advanced Options menu you will see an entry Recovery Menu that you need to select.
Carefully select the
grub
– Update grub boot loader option.It will automatically add an entry for Windows 7/8/10 to the boot menu.
To restart, press Ctrl+Alt+Del.
The system will restart and you finally have a option to select Windows 10/8/7. Select Windows and finally you have with your Windows OS.