My Mac has started slowing down recently whenever I run a particular program. This is a language program that says it requires 64 MB of RAM to run. It runs off of a CD in the disk drive. I also have been using a USB headset at the same time. The program runs slowly and will pause, the disk drive stops and starts. The program has crashed a few times. If I unplug the headset, the performance improves. So obviously the program and the headset together tax resources too much. This surprises me, however. I'm running OS X 10.3.8 on a Aluminum Powerbook with a gig of RAM. It seems like there should be enough resources to run both the program and the headset. Activity Monitor says a bit over half of RAM is free. Activity Monitor also says that the language program is taking 89 percent of the CPU. Are my expectations excessive or does something need attention? Peter