1. Open Control Panel
2. Administrative Tools
4. Look for "IMAPI CD-Burning COM Service" under name (I suggest clicking on the "Name" bar to organize it in chronological order first)
5. Right click, go to Properties
6. In the "Startup Type:", select Disabled
7. Apply and close, no need for reboot, close Nero if needed, and reopen. You should see a difference in the time Nero loads from start to finish compare to how long before this tweak.
Note: If you disable the service you may notice error messages in your event viewer. If this tweak should help, ignore them.