XP Pro SP1, at some point (not SP1) recently my Task Manager no longer shows in the system tray when minimized, it just sits on the task bar, so I don't get the CPU activity icon in the tray ...
I have a windows 7 and an xp machine. With 7 it's pretty easy to see whether you have enough memory or not (open task manager and see if you have significant amounts of "unused" memory) but with xp ...