Screen Rotation Shortcut For Vista

Supported OS: Windows XP Tablet Edition

Supported Graphic Card: Intel Graphic Card

Note: "complementary with ..." means if the combination does not function, try the other combination after "with".

Ctrl-Alt-Up: -180 degress (complementary with Ctrl-Alt-Down)

Ctrl-Alt-Right: 90 degrees (complementary with Ctrl-Alt-Left)

Ctrl-Alt-Down: +180 degrees (complementary with Ctrl-Alt-Up)

Ctrl-Alt-Left: 270 degree (complementary with Ctrl-Alt-Right)

To disable it:

On XP: Start >> Control Panel >> Display >> Settings >> Advanced >> Intel Graphics >> Graphics Properties >> Hot Keys >> Disable the combination

On Vista : Start >> Control Panel >> Personalization >> Display Settings >> Advanced Settings >> Intel Graphics >> Graphics Properties >> Hot Keys >> Disable the combination

Reference: Link