I have installed windows 7. I have lost my all data which were in ubuntu. Now want to get my all previous data. I have installed windows 7 in other partition. Ubuntu partition lost all data if it is possible that I restore Ubuntu please tell me.
If you have installed Windows on another partition (and not formated your Ubuntu partition), you should be able to boot a live-cd and reinstall the boot loader (grub) from there - you can find tutorials for "grub reinstall" online. This looks good, actually: https://help.ubuntu.com/community/Boot-Repair