TURN YOUR MONITOR THE OTHER WAY UP.....!
No but seriously, you need to go into display properties. Right click on your desktop, open 'properties' Then open 'Settings' and then 'advanced settings' Depending upon which video adapter software you have, you will find an option to rotate the screen in there. These instructions are for XP backwards (ME,98,95 etc) but will be similar in vista..and the new windows 7.. Hope this helps
JamieB
October 2009