Windows by default does not provide an option to hide disk drives or partitions. Hide My Disk is a small and easy to use freeware application that allows you to hide/unhide specified hard disk(s) and/or partition(s) in Windows 7. You can easily hide or unhide any hard drive or partitions using the simple interface, just select the drive and hit the hide button and the drive is hidden instantly.
To unhide a drive, select the hidden drive and click UnHide button.
Before hiding the drive
After drive hiding
Easy and secure, Hide my Disk employs a unique (EBOF-BEOF) technology that does not require installing drivers or services, unlike other similar software. The only disadvantage of using Hide my Disk is that there no mechanism to password protect the application (which is available only in PRO version).