My Dell Studio XPS 13 has a brightness up & down buttons (Fn + up arrow / down arrow), as do most laptops have. It's running Windows 7 64bit and I've installed Windows Live Messenger (build 14 and something) on it.
When I hit Fn + down arrow, to reduce screen brightness, the Messenger window pops up. That's true whether it has been running in background (system tray / minimized) before or not.
Note, to make messenger hide itself to the system tray, I've set it to Vista Compatibility mode. I don't think that has anything to do with it though, since if I shut compatibility mode off, the problem persists.
There's a thread on the matter here, but with no solution.
Thanks,
Asaf
SOLUTION:
Stop Intellitype when using internal keyboard. See detailed howto here.
EDIT: Some new findings on the matter -
If I exit messenger entirely and restart (or simply stop) the service "Windows Live ID Sign-in Assistant" the problem is solved until I run messenger again. It persists even after entirely closing messenger, until I restart the said service.
EDIT2:
The above service "Windows Live ID Sign-in Assistant" actual name is wlidsvc.
There's no shortcut defined for messenger, nor is there any other hot key in its preferences.
EDIT3:
I'm not sure if it's relates, but some of the Fn keys are not working - Fn + F1 doesn't put the machine to sleep, Fn + F3 doesn't show battery status.
EDIT4:
Problem probably relates to conflict with IntelliType Pro. See my answer below.
Said conflict also causes Undo command when disabling Wireless (Wireless touch button), and other side effects for various keys.
