Help. Digital noise and CPU spiking constantly.

Hello,
Ever since I got the latest software update I've been having serious issues. Anytime I try to play a software instrument in Logic Pro 8 or Mainstage I get hellish digital pops and clicks and the CPU spikes up constantly. An error message says there's a conflict with a third party midi driver. I've deleted every suspect midi driver I can find. I tried everything in the trouble shooting guide short of reloading Logic but nothing's worked. I've just been using the built in audio card and it worked great up till this point.
Any ideas? Can I role back the update? I can't seem to find how to do it.
Thanks

Apple released a Macbook Pro firmware update yesterday.
This firmware update appears to have fixed the large CPU spikes in Apple Logic Pro that began after the last recent Airport software update. Previously, when running Apple Logic Pro even with a small # of tracks with the Airport enabled there was digital noise and one of the CPU peaking very frequently. In order to record or play back with out these issues the only solution was to turn off the Airport. Since I installed the firmware update I have used Logic Pro extensively yesterday recording and playing back projects that previously had this issue and did not have the CPU spiking or digital artifacts.
Thank you Apple!

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