When blocking CD/DVD in Device Manager it also blocks Virtual CD/DVD (Such as mounting a .ISO file)
Most of the time this is likely desired, however in the instances that it is not this article describes how to create an exception that allows access to a Virtual CD/DVD device while still blocking physical drives.
Create an exception using the Device Instance ID under the CD/DVD/Blu-Ray Drives section in the Device Control Agent Settings.
1. Open the desired Device Control Setting.
2. Go to the CD/DVD/Blu-Ray section on the left-hand side.
3. Click "Exceptions" on the right-hand side.
Enter the exception as listed below:
You can cut and paste from here: