or, you can remove the drive letter associated with it and Explorer will no longer show it in the list of drives.
See this mini tut I just made for ya.
This is the image of my current drives in Explorer Attachment 19298
This is how it looks in Disk Management (start --> right click Computer --> Manage --> Disk Management
) Attachment 19299 Right
click on the partition you want to hide and select Change Drive Letter and Paths...
- then select the Remove
button as shown below: Attachment 19300
Warning you'll get about programs that might need the drive (safe to ignore since it is used by another OS) Attachment 19301
Additional warning you *may* receive if Windows 7 has been monitoring the drive for anything Attachment 19302
No drive letter attached anymore in Disk Management Attachment 19303
And no more drive in Explorer Attachment 19304