On 16 May 2007, "ASI Industries"
wrote in alt.comp.hardware.pc-homebuilt:

It could be that Starforce cd/dvd protection software is installed
on your system via any paid software installed!
http://www.glop.org/starforce/remove.php

I've never heard of that one before. I see no sign of it on my system
(unfortunately, in a way, since that might have been The Answer), but
I'll watch out for it in the future.