Thanks for the reply!
No, this is even when Pro Tools isn't launched.
I have a persistent problem of startup failure which happens when the DAE INIT comes up. This is reported as a bus error. Pressing the shift key to start without extensions doesn't work, either. Eventually it will start up and Pro Tools will work fine, but something's obviously wrong somewhere.
I've tried changing the RAM chips but the problem still persists.
I ran a Verify with Disk First Aid yesterday and it reported a problem (Keys out of order, 4, 641) which it was unable to repair. Also, when booted off CD Rom there is no System Folder visible on my System Disk, which is weird.
The Largest Unused Block of RAM is 1.44Gb I can't check much else at the moment as it's all on the System Drive and I can't do anything in that folder for obvious reasons!
I'll probably have to change the Startup disk, which I'm reluctant to do as I have a few TC Plugins that have authorisations unique to this computer. I'm sure I read here somewhere that it's possible to clone a drive and retain all that kind of stuff. Perhaps some kind person could point me towards that if there's no alternative.