Keyboard shortcut | Does what | Works on | Notes |
Win+P | Brings up the dual-monitor settings. | Windows 7 | |
Win+X | Launches Windows Mobility Center | Windows Vista, Windows 7 | |
Win+L | Locks computer | Windows XP and above | |
F2 | Rename file/folder | Windows | In Windows Explorer |
More to come…
Link to a KB article that lists a lot of shortcuts: http://support.microsoft.com/default.aspx/kb/126449