Access to DVD-RW drive blocked by restrictions

Giganews Newsgroups
Subject: Access to DVD-RW drive blocked by restrictions
Posted by:  South Essex
Date: Mon, 10 May 2010

Stand alone PC running Windows XP pro SR3

My DVD R/RW drive (my drive "D") is running correctly but cannot be used.
If I go to Disk Management under Computer management and locate the drive
then attempt to run the disk loaded into it I get the following message "This
opeation has been cancelled due to restrictions in effect on this computer.
Please contact your system administrator."

I am the system administrator and have not set any restrictions regarding
use of drive "D".

The drive has been replaced twice and will power up if a DVD is loaded
however it cannot be read or run.  Also the drive is not listed under "my

How can I get rid of this restriction.