I have installed Ubuntu as Dual BOOT with Windows 7 . I didnt had any partition for Ubuntu . Now i have to remove Ubuntu . How do i do so ?? Pls help . It is urgent
You can go into Administrative Tools and Select Disk Management, this should bring up your partitions, delete the Ubuntu partition (in the screenshot it's e.g. the 6,33 GB partition), then you have to restore the MBR.
Here is a good forum post explaining how to do that. If you don't do this you won't be able to boot into Windows.
All this is assuming that you didn't use Wubi, if you did all you have to do is go to Add/Remove programs or whatever it is in Windows 7, find Ubuntu, and uninstall it like you would any other program.