hide & lock 2 seperate partitions both with Windows 7

I just recently got a new computer, and my brother tends to monkey with things. He's not very clean either, so I've installed to seperate instances of Windows 7 in a dual boot manner. One for him, one for me. Now when I log into either one, I can see the partition that is being used for the other one. I would like to hide and lock each partition so it may only be seen and accessed by people or programs when booting into the windows 7 that is on it. How would I go about doing this?

Joe S

Excellent Member
Pretty extreme fix but you need more advanced help on how to lock down your partition and boot manager so he can't mess that up . Can you give him a limited user account where he can't install anything or change settings? that would be easier.

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