fixing unstable performance on macbook pro

Hi team,

I have a macbook pro bought nov 2011

It has run fine but recently I have been using it constantly for my new job running Adobe software like Flash, premiere pro and after effects (mainly flash) cs5.5

intel i7 2.4ghtz quad core with 8Gb ram, shipped with Lion, I have run apple hardware test (short and long) and found no problems.

Ok so I am having strange behaviour, the audio keeps killing itself, and I have to run the terminal sudo killall coreaudiod.

My programs are crashing constantly- mainly Flash, Ihave been working on my project for two months and all of a sudden it has become highly unstable, sometimes crashing 10 times in a row.

I am constantly fixing disk permissions

Permissions differ on “usr/lib/ruby”; should be lrwxr-xr-x ; they are drwxr-xr-x .

even if I fix the disk permissions and then do it again straight after I get this same message

I have got a bootcamp partition on this laptop and it does not show up on the mac side, it is greyed out when looking at it in disk utility.

Now I do have an older macbook pro and I know that this is not how it should be.

I am getting a new windows workstation (sorry mac fans!) to run 3DS max and as soon as it comes and I have transferred all data I will try to reinstall lion on this macbook and stop running bootcamp, I have found this laptop does not like it (bootcamping that is)..... but does anyone have any short term solutions for me? I am running time machine so I can get data back.

I have never has this kind of performance problems from a mac before (and I have worked with a lot)

any ideas how to start enjoying to work on this machine rather than it being an extended scary and stressful experience.

Cheers

sub