Let me begin by saying I think Mint 12 is a terrific OS, which I am using on several computers. But I have computers on which I use Music Bee in Windows 7 for my music files and want direct boot to Windows without any disk space devoted to Mint. I spent several days looking at complicated instructions for removing Grub and finally accidentally discovered a simple solution, which is as follows: In Windows, download Partition Wizard at http://download.cnet.com/MiniTool-Partition-Wizard-Home-Edition/3000-2094_4-10962200.html. Install. Partitioning will be blocked by Grub. But on your left hit Rebuild MBR. This will take only a few seconds. Reboot, and Windows 7 will boot. Then you can go into Partition Wizard and eliminate the Ubuntu partitions and expand your Windows data partition to take up the freed up space.
Edited by moderator to clarify title and scope of topic.