Problem During Window and Ubuntu Installaion

Question

My Laptop was running win 7 and Ubuntu on dual boot with grub bootloader. But i have changed my win7 to win 8 but when i start my laptop there is no grub and no option to start ubuntu i know ubuntu is installed but not showing help !!!

Answer 1

mbr overwritten. will probably have to reinstall grub
https://askubuntu.com/questions/126541/how-to-manually-install-boot-loader

Answer 2

+1 shouldn't have updated.

Anyways, did you try this:
http://www.skipser.com/p/2/p/disable-user-autologin-windows-8.html

Answer 3

D :

windows 8 y u do dis to us!?

Answer 4

Finally, Problm is Fixed !!!! Thanks, Guys.

Answer 5

Your Blog Said : -

Boot the machine using a Live CD.
Open a terminal.
Find out the name of the internal disk by using fdisk to look up the device's size.
For example:
sudo fdisk -l
Install GRUB boot loader onto the proper disk (the example below assumes it is /dev/sda):
grub-install --recheck --no-floppy --root-directory=/ /dev/sda

but what is fdisk -l ?????

Answer 6

Windows installations don't like Grub, so they overwrite it. The best way to fix this is using a ubuntu startup disk and restoring the boot-sector.

See https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows for detailed instructions.

Answer 7

fdisk is a commandline tool for checking and repairing your file system. And the -l is the Option to list all partitions in your system. so if you open up a terminal an typing "fdisk -l" it should show up all your harddisks and partitions in it.

Normally your systems and so your Main Boot record should lie on the first disk in the system. under Linux that's /dev/sda. So in most cases the commands you posted should work