I am having troubles installing ubuntu 11.10 on my 80gb drive. Everytime I try it always fails to install the grub boot loader. I followed the instructions on on this page
Any help from anyone?
Install the GRUB bootloader to your MBR, not to a partition. [i.e. to /dev/sda instead of /dev/sda3]
You can still boot windows from Grub, and you can always even reinstall the Windows bootloader to the MBR by inserting the Windows 7 disk, select repair, and it will automatically detect the bootloader missing and install it.
Edit: I looked at your comments, do you have a separate physical drive for Ubuntu or just a partition? If you have a separate physical hard disk, you need to either install it to your windows hard drive, or change the boot order of the hard drives in your BIOS so that the Ubuntu disk comes first.
Edit 2: I did not say this, but I also implied you must also install GRUB to the MBR of your Ubuntu drive, in addition to setting it to boot from that first.