A month ago I decided to dual-boot my laptop with windows 7 and Ubuntu 10.04 version as my main operating system. So I first installed Ubuntu 10.04 then Windows 7 afterwards. After installing Windows 7, ubuntu distribution isn't accessible. I am not sure but I think Windows installation might have wiped out Ubuntu grub.
To be able to recover Grub2 menu along with the option to select either which operating system you want to use, I did the following recovery steps below.
- Boot from Ubuntu Live CD - any Ubuntu distribution is okay to use for as long as you get access to linux terminal or bash shell.