how to let thw user have the rights to access drivers folder

Take a look at the following article, Delete Undeletable Folders under Vista or Windows 7[^]. It explains how to gain access to the files / folder which are otherwize not accessable as in your case.

From the article
=========================
The main idea behind the program is to fix the access rights for every file and folder.

private static void FixAccess(FileSystemSecurity sec)
{
    string currentUser = WindowsIdentity.GetCurrent().Name;
    sec.AddAccessRule(new FileSystemAccessRule
    (currentUser, FileSystemRights.FullControl, AccessControlType.Allow));
}

I also clear all the existing rules in the hope that it will avoid conflicts.

foreach (FileSystemAccessRule fsar in sec.GetAccessRules
    (true, true, typeof(System.Security.Principal.NTAccount)).OfType<filesystemaccessrule />().ToArray())
{
    sec.RemoveAccessRuleAll(fsar);
}

Unfortunately, most of this was failing at the beginning and I could not find out why. I thought the solution was to fix the ownership of the file.

private static void FixOwner(FileSystemSecurity sec)
{
    var sid = sec.GetOwner(typeof(SecurityIdentifier));
    string currentUser = WindowsIdentity.GetCurrent().Name;
    var ntAccount = new NTAccount(currentUser);
    sec.SetOwner(ntAccount);
}