This question already has an answer here:
I installed Ubuntu on Windows 7 now neither OS boots up.
How can I recover Windows OS and uninstall Ubuntu?
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
Boot up Windows install DVD, & choose
open command prompt and Run the Following commands
Reboot to windows and use a partitioning program to remove Ubuntu's partition