Please help me with pro tools m audio 8 cpu overload!!!!

[Oboist]

Hello-

I currently am running Pro Tools M-Powered 8 on my MacBook with a Firewire 410.

Ever since I upgraded from Pro Tools 7 I keep getting the same " Cpu overload, (-6101)" Message. Every time I record a new session this happens within the first 20 minutes. I record classical music whether is be opera singers or a trumpet recital. I only record with 1 Stereo track enabled and recording...and I still get this overload message.

I have tried everything from trashing prefs, DAE, disabling internet, bluetooth, spotlight even resetting the PRAM.
I also just uninstalled protools 8 then re-installed it and it kept happening.
I've tried every different combination of things in the playback engine ie; 512 samples, 1024 samples, even 2048 samples...NOTHING WORKS.

Please...help...I have no idea where to go from here. I can't even record myself with 1 mic, 1 mono track NO PLUG-INS without is overloading.

Im at my whits end ...please any suggestion will be greatly appreciated...I can't afford the $3.00 a minute at digidesign tech support for them to tell me something I already know wont work...PLEASE HELP!
Thank you so much for taking the time to read this!
Thank you thank you!
Take care-
Lindsay