This article usually applies to older versions of ImgBurn.  As of, the installer will do these steps for you automatically if you specify: Enable SPTI access for All Users.
When you run ImgBurn without Administrative privileges you will get an error: You need Administrative privileges to use SPTI.
This is a Windows security policy that is causing the issue. Here are the steps to circumvent the issue:
  1. Login as an Administrator or run a command prompt as Administrator
  2. In the command prompt type: secpol.msc  (hit enter)
  3. Now expand: Local policies -> Security options -> Devices: Restrict CD-ROM access to locally logged-on user only -> select Enabled
  4. Close the Local Security Policy management console and log off and back on to Windows