|Upside-Down Display In Windows XP|
Within Windows XP, certain video drivers or graphics card chipsets supporting 180 degree screen rotation can cause the Windows XP display to be presented upside down. This can be (but is not always) tied to lowering the screen resolution in some accessibility programs.
To revert to a right-side up display, hold down the CTRL, ALT and UP (arrow) keys.
All of my windows are upside down
Somehow, the settings on your graphics card has changed. This setting is specific to your video card manufacturer, so it may be necessary to contact them to find out where this setting is located. But if you would like to prowl around, it shouldn't be that hard to find. I may even be able to get you pretty close. Here is where mine is located:
Go to Start>> Control Panel>> Display icon>> Settings tab>> Advanced button>> Intel(R) Extreme Graphics tab (or whatever your video card is)>> Graphics Properties button>> Rotation tab.
Or, possibly quicker:
1. Right click a blank area of your Desktop
2. Select Graphics Options
3. Choose Graphics properties
4. Select the Rotation tab
The Display Rotates 180 Degrees When You Lower Your Screen Resolution Using the Accessibility Wizard