Imgburn is free.
Also I would set "Lock Volume Exclusive Access" as shown in the Screen Shot.
You get there by Tools=>Settings=>Write tab.
I don't know how good the built in CD burning is. I've been using Imgburn since XP SP1. I try to get my flavors of Windows working as much the same as possible. I find it distracting to remember which thing is in which place because it's on this flavor. I write a lot of my own utilities so that I can hit the same hotkey on all the flavors.
edit: I forgot to mention.. the reason you do that Imgburn setting is because when you try to start the burn, if Imgburn sees another app is trying to control the drive, it will pop up an error. It can be a good way to find out if you have 2 or 3 different apps fighting over which one controls the optical drive.