Are you trying to remove Ubuntu 12.0.4 dual booting with windows 7? It is really easy to do it. Just follow these steps to do it.
Requirements To Remove Ubuntu 12.0.4 Dual Booting With Windows 7
Windows 7 repair disk (click here to learn how to create one).
After you remove Ubuntu 12.0.4, you might not be able to boot into windows 7. You can solve this error if you have your windows 7 repair disk.
Here Are The Steps To Remove Ubuntu 12.0.4 Dual Booting with windows 7
Boot into windows 7, right click on my computer and click on manage.
When you click on manage, the computer management window will appear on your screen. On this windows, click on ‘Disk Management‘ under Storage on the sidebar.
Disk management will show you all the list of hard disk partitions. Now you will have to find the Ubuntu 12.0.4 installed partition. Use these tips to determine the partition that contains ubuntu 12.0.4:
* Ubuntu 12.0.4 Partition doesn’t have a name
* The approximate size of the partition is 65-70 GB
* File system is not normally specified
Once you have found managed to find the Ubuntu partition, Right click on it and click on ‘delete volume‘. Now have your repair disk with you.
Reboot the computer. If you are able to boot into windows 7 successfully, then you don’t require a windows install disk. If you get the error that says ‘ No Such Partition; Grub Rescue‘