What have you got for your screen saver on your PC. Mine is the Marmite screen saver.
Mmmm I love Marmite
here is mine..
Mine is a big fat pig.
Currently using the rather nifty really slick screensavers (www.reallyslick.com). They're very pretty but need a reasonable graphics card to run smoothly.
Also got an installation of Windows Vista on both my PCs now, it has a really nifty couple of savers, but they don't support dual monitors yet.