Hi, Yes, MCSX is the only program that crashes. The PC works without other problems. I would try another computer, but my wife's laptop is my only available option, and that could cause marital discord.

I don't know much about managing computer resources. Everything is as came with Windows XP, as far as I know.

I'm not familiar with the Task Manager. When run, it lists the Physical memory as;
Total 2.35 mb
Available 1.61
System cache 1.19