but... regarding the key;
I was actually curious about that key myself, some time ago. it's been present on my XP desktop, as well as Vista laptop and new desktop build running vista.
In my case I have several keys underneath it reflecting the games I have installed that use that copy-protection technology, Age of empires 2, quake 4, Halo... etc.
while the name they chose certainly raises an eyebrow, looking past the name, it's really just a few morsels of irrelevant data- nothing to be concerned about. Again- I was quite curious about the key myself, and in fact ran Registry Monitor to find out what was accessing the key, to discover it was accessed when I played some of my games. After much investigation about the games that did and did not trigger the discovery I discovered each game that did access the mystery key had the "secuROM" copy protection.
Of course if I had simply done a google search I would have discovered that quite quickly, but I guess I like the thrill of the chase