completely uninstall ubuntu

[uttaran]

I've a dual boot of ubuntu and windows. I don't want ubuntu since it is not running in my hardware. How can i uninstall it neatly so that i can boot into windows without formatting??????????

[aheckler]

Boot to the Ubuntu LiveCD and use the partition editor to delete Ubuntu's partitions and expand the Windows partition.

[oldos2er]

First thing would be to restore Windows' boot loader, then remove Ubuntu's partition(s).

[uttaran]

how to restore windows boot loader???

[Partyboi2]

If you are using xp you can boot a xp installation disk and enter recovery, then when at the prompt type

fixmbr
If you don't have a installation disk you can use supergrub (http://www.supergrubdisk.org/) to restore (http://www.supergrubdisk.org/wiki/UninstallGRUB) windows boot loader.