Possible Duplicate:
How can I repair grub? (How to get Ubuntu back after installing Windows?)
I just install Windows 8 without effecting Ubuntu. But it directly boot into Windows 8. How can I re-install grub boot loader?
Possible Duplicate:
How can I repair grub? (How to get Ubuntu back after installing Windows?)
I just install Windows 8 without effecting Ubuntu. But it directly boot into Windows 8. How can I re-install grub boot loader?
Checkout this link to recover Grub:
https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows
I would try using "boot repair". For all my boot problems the default setting has worked for me. From blank grub screens on a 12 year old computer to booting from a windows 7 install.
https://help.ubuntu.com/community/Boot-Repair
Basically you will boot from a live dvd/usb and install boot-repair via this command:
sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair
and select recommended repair. I will uninstall and reinstall grub, so if windows removed it, this will fix it.
Again, for me this has been the easiest way.