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Hey guys, I'm running Windows 7 x64 and every time I boot my machine it changes the letter of one of my drives. I have four drives and this is the only one that ever does this. Any ideas?

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You have provided insufficient information for us to help you. Explain your hardware configuration, including drive type, BIOS settings, and so on, and we may be more forthcoming. – user3463 Dec 7 '10 at 6:30

Have you tried assigning it a specific letter? There's a walk-through here:

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