weird. I don't know what to think about that one.
Have you downloaded the Synaptics drivers? (assuming that what it uses)
Go into the Device Manager and uninstall anything related to the keyboard or touchpad devices. Reboot and let...
somehow someone must have triggered the rotate screen function. Sometimes there is a hotkey-shortcut to rotate the view, but I don't think it should be enabled by default. Look under the advanced section of your Display Properties.