alz

After I've clicked OK. I will look into the shell extensions.

Thanks for the reply. Taskmanager shows Imgburn.exe using 100% CPU. This only happens when I choose Write mode and hit the folder icon to browse for an iso and select the iso. Right click 'Open With' or dragging and dropping the iso onto the source box does not cause the 100% CPU usage. edit: typos

I'm not sure where to look for a cause.