I had a system running Windows 7 Home premium and Ubuntu 10.04, side by side dual boot.
I got an Ubuntu 10.10 image, so I decided to update. But during the installation I made a mistake by specifying the whole partition, and after the installation of Ubuntu 10.10, I saw that my Windows and all the other data was gone.
There were around 250GB of data. Is there any way I can recover it? I had a lot of irreplaceable photos and collections on the drive. I do have a recovery CD for my Windows, but it does not detect any Windows OS.