properties for MusicMatch and on the shortcut tab you should see any hotkeys.
By any chance are you using a Logitech wireless keyboard? If so it has keys on it that are preset as MusicMatch hotkeys.
Possibly other multimedia type keyboards would also be suspect.
I have been having an odd and persistent problem on my computer over the last one year. I touch-type reasonably fast but make errors now and then. Every so often, with some combination of keystrokes, I start MusicMatch Jukebox which starts up with an annoying fanfare and interrupts my work. In spite of typing multiple combinations of Cntrl, Alt, Shift with various keystrokes, I am not able to replicate the startup except through accident (since there are several hundred combinations). Is there any way to find out which set of keystrokes is starting the program? And how can I disable it? I checked the task monitor to see if mim.exe or mimboot or any other MusicMatch loader was running in memory when the computer boots, but nothing shows up. I am running Windows XP on a Dell Workstation with 1GB of RAM and a 2.20 GHz Pentium 4 CPU.