What all do you have running in the background? I use a program called "EndIt All" (free), to close down anything not needed in the background. After you are done recording, reboot and everything is back to normal.
When I try burning CD's using Itunes, Windows Media Player, or any of the other third party burning programs I have used in the past, my burner starts burning, but stops two or three tracks in.
I am running Windows XP. I have checked to see that recording is enabled on my drive, I have slowed the recording speed down to 2x, I have tried 3 brands of CD's and still nothing. Last summer I burned a lot of CD's without any problem, but now nothing