On my Windows XP, pressing Ctrl-Alt-Left/Right flipped the monitor's
current state. And this key combination conflicted with IntelliJ Idea's
shortcuts for navigating back/forward, here is a solution :
The issue is caused because Intel(R) Extreme Graphics default installation.
To resolve it navigate to Control Panel and pres on Intel(R) icon
Navigate to Hot Keys tab and remove the check from the box labeled Enable Hot Keys.
When set to enable the CTRL+ALT+Arrow function will flip your monitor