Hi
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Authenticated user includes all users with a valid user account on the computer or in Active Directory services.
Follow the instructions below which might help you in resolving the issue.
Let us try to rename the drive in Clean boot mode.
Step 1: Perform a clean boot
Step 2: Enable half of the services
Step 3: Determine whether the problem returns
Step 4: Enable half of the Startup items
Step 5: Determine whether the problem returns
Step 6: Resolve the problem
Step 7: Reset the computer to start as usual
How to troubleshoot a problem by performing a clean boot in Windows Vista
http://support.microsoft.com/kb/929135
After checking the issue, put the computer back to the Normal mode.
Uninstall or update the program which is causing the issue.
Check if the issue is resolved.
You may refer the link below.
Rename a drive
http://windows.microsoft.com/en-us/windows-vista/Rename-a-drive
Please post back and let us know if this has helped to resolve your issue.
Regards,
KarthiK TP