I am using Windows 7 Home Edition SP1, 64-bit.

Every time that I boot up Windows, a cmd.exe window automatically opens
up for just a few seconds and then disappears. I would like to know
what causes that...

These is no cmd.exe in
c:\Users\username\AppData\Roaming\Microsoft\Wind ows\Start
Menu\Programs\Startup, so if anyone knows how to track down what
launches this cmd.exe window I'd be curious to know too.