It must be simple but I cant figure out, in the sharing tab I see that the other disk are not shared but yet when I login with guest account I can browse all the disk.
How to disallow guest account to browse all disk except C drive?
As the guest account is a member of the "everyone group" it will have the view and navigate permissions that are default for this group.
To do what you wish you could remove the everyone group and then grant the users specific rights where you wish them to see
or you could set a deny permission to the guest account for those areas that you wish to keep hidden from them.
I would advise caution in changing the everyone group permissions or setting deny options as this can, if sufficient care and planning is not taken, cause unpredictable results including completely locking out all users
I agree with Barman... I wouldn't mess with default permissions on default accounts or groups. The guest account has the same basic permissions as a standard user account anyway so I would just create a new standard user account and deny it read and list permissions for the other drives.
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