How To uninstall an operating system !

[Carbon]

Can You tell me how to fix the GrUB using EasyBCD. i have EasyBCD, but don't know how to use it.

When system is booting press F8 and choose system recovery.
In system recovery select command prompt and type

bootrec/fixmbr

[pioneer_fawad]

simply format the partion this will uninstall both operating system Cheers

edit:

sorry just change boot file and remove loading of Kubuntu operating system and manually delete the space of Kubuntu to used by Windows 7

[Ultim8nexT]

When system is booting press F8 and choose system recovery.
In system recovery select command prompt and type

bootrec/fixmbr

Thanks u very much!