New
#31
Is this not just a permissions problem?
W7 by default requires "complex" passwords and will not allow any user onto any of it's shares that doesn't have one. (and guest is off by defaut I think) so by default it's hard to get other users onto a W7 share typically.
You can lower the requirement to simple passwords on the W7 machine that took ownership of the drive or "upgrade" your password for the user account on the other machine (the min requirement is 8+ characters, at least one number and one puctuation I believe). You may then need to actually add the other machine's user as a user for permissions on that folder before they can access it.
I had some sharing problems till I changed my other user passwords to match the default level of W7.
[Edit]
The permissions will follow the drive (even if the W7 machine is off) but I admit I am not sure about the intricasies of older OSes acessing the permissions on a W7 owned drive/folder...