How To Change Drive Letters in Windows 7

1. Open Windows 7 Disk Management from the Computer Management utility.
    
2. On the right-hand side of the screen, locate and right-click on the drive that you wish to change the drive letter of and choose Change Drive Letter and Paths....
3. In the Change Drive Letter and Paths window, click on the Change... button.
   The Change Drive Letter or Path dialog box will appear.
4. Choose the drive letter you wish to assign to this drive by clicking the letter from the drop-down box on the right.
   Click OK.
5. The Disk Management window that appears advises you that "Some programs that rely on drive letters might not run correctly. Do you want to continue?".
   Note: If you have software installed to this drive, the software may stop functioning after a drive letter change. Nearly all software defaults to the primary drive though, so this is rarely a concern.
6. If you're sure you want to make this change, click Yes.
   This change should be almost instantaneous.
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