The machine is a Dell Dimension XPS T500 desktop with an Intel Pentium III processor, 498MHz, 256Mb RAM. The OS is Windows XP Home edition V2002 with Service Pack 1. I keep it up to date from Microsoft.
I can't remember exactly what the error message is except it's the blue screen of death. When it happens again, I'll write it down.
Huggyg71 - I haven't installed anything recently. This has been happening on and off for a couple of months.