I didn't say I'd never had a crash with Windows, when using Win98 it was a crash a minute but XP is much more stable and I do have a very stable system. I've been using computers long enough to be very wary of what I install so as not to have any conflicting software. The priority thingy in the task manager actually tells the CPU which programs get to use the resources of the CPU so it does make render times slightly less, it has nothing to do with the ram. The only time I get a crash whilst using Bryce is when I've been making lots of changes in the DTE and Scott Tucker told me that this is a known bug in Bryce that has been there since beta days and never got fixed, so still no Windows crashes in connection with Bryce. Catlin