Restricting a user to particular drives

Hi,

I have been using Ubuntu Linux since quite some time, and have found it quite good on permissions fronts.
I can create a folder and set group permissions very well.

I have a Windows 7 Ultimate x32 at my home, and that PC is used by 2 people.
It has some crucial and private data.
I would want to know a way I can restrict a user from accessing predefined drives only.

for example, I create another user for my room-mate and restrict him from accessing my E and F drive somehow, giving him restricted rights too.

Is it possible!?

I found a nice tutorial here , but that's to lock a folder, and haven't been tested by me.

Please let me know as soon as possible.

Thanks for the links!
Im looking into them
I kinda had a feeling that I have to play with GPEdit.
thanks for notifying me about the complexity, I'll take care of that.
I just revert if things work the way I want them to.

Thanks a lot!

Yes, that's an obvious thing I was going to do before I play with it.
I'll revert by tonight (By Indian time)
Thanks once again! :)

P.S. I like your avatar!

Hi Maguscreed,

Exactly what you had warned me about, just happened.
Sadly, I lost access to my F drive.
I followed the link titled: Permissions - Allow or Deny Users and Groups

I did create a restore point before doing so, but it doesn't work.
Although F didn't have any crucial data, but still it was important.
I hope i can gain access to it soon.

To reiterate my problem, I have created another standard user for my dorm mate and would want to restrict his access to my E and F drives only.
Whenever I tried setting policies for him, all the options seemed to have been setting permission for ALL the users, including me too, although I don't want to restrict myself.

While trying the above link, I didn't see his user name in the list of users, so I restricted access to all the "Users" but did let "Administrators" have full access, since I am an administrator, I should have been getting access, but it didn't happen.
I am sure I mistook somewhere, but just don't know where.
Can you help restoring what it was like before all the mess happened!?
Please!

@logicearth thanks for telling. I would love if you could tell me the procedure to regain acess to my drive and do exactly what I want.

@maguscreed im currently trying to login with super admin, its weird, unlike xp, a login prompt doesn't appear when I ctrl+alt+del twice on lock/login screen.
I am going to try with safe mode.

Hellow!!?
Please help me!
I tried many ways but neither I could log in as super admin, nor I could gain access to F drive.
and my motive of restricting it for a limited user still remains the same.