Anybody got any ideas? Here's my problem: Firstly, my Powermac seems to hang a lot - or if it's not hanging it crashes individual programs a lot! For example, I notice in particular if I am using an external USB 2 Hard drive it doesn't usually copy all the files I ask it to over...it will get to say 3.25 Gig out of 10 Gig and hang. It's a restart needed. Another case (where the aforementioned drive is now off) is that it will say a program is open but it won't actually bring it on screen. If I go to the Force Quit menu, it tells me the program is not responding. Prior to this recent crop of problems, I've never had a mac hang on me so this is extremely unusual. The main problem however is Audio issues: I used to be able to run around 20 instances of the East West Quantum Leap Symphony Orchestra - now with just two intances I hear a large "POP" and the sound goes dead. It can be fixed by restarting logic, but then as soon as it plays more than a couple of samples together, we get this POP. The CPU meter (both within logic and the Activity Monitor) is reading 10% load, and I have 1.5Gig of ram that tells me there is 700 Free! So, what on earth could it be? Sometimes it will behave itself (although the audio thing is a big problem as I have a huge project approaching) and sometimes I wil restart 3-4 times in a day? Incidentally, I thought it was the Hard Drive and replaced it and tre-installed OS from scratch and the problem remains. I'm desparate, help me!!