I wanted to dual boot Win7 and Ubuntu 12.04LTS. So, I installed Win7 first.
Then I installed Ubuntu 12.04LTS, using the "side by side" option and it went through fine and I got the grub loader asking for which i wanted to boot.
Then, there was around 100gb or unallocated space which I made as a partition of windows. After performing that operation (I don't know if that is consequential), I'm unable to boot to any of the operating systems.
I get this error message-
error: no such parition
I can view the Linux filesystem and the Windows Drives and Data when i boot through the USB (and am composing this post hence).
I think the grub menu.lst (??) or an equivalent of it in 12.04 file is lost. I'm new to this "new" Ubuntu.
Thanks for the help.