Apparently the current versions of the Winamp plug-ins "Nullsoft CD Plug-in" (in_cdda.dll) and "Nullsoft Rip & Burn Plug-in" (ml_disc.dll) cause Windows 7 systems with Daemon Tools (or similar virtual disc drives installed) to completely lock the system when right clicking any song/album/artist and opening the Send To menu. Yikes.
ml_disc.dll is used to provide burning/ripping support, while in_cdda.dll allows Winamp to use your optical drives.
Lockups are easily worked-around by going into your Winamp installation's "plugins" folder and deleting ml_disc.dll, and possibly in_cdda.dll if it still happens. You could also move them out of the Winamp folder entirely to achieve the same effect.
If you'd rather keep this functionality, the other workaround for now is equally easy: just uninstall whatever virtual disc software you use. If you can't live without either, you can always use hotkeys instead of the menu.
I just removed the plug-ins since all my music is already ripped. Worse comes to worst, I can just put the plug-ins back into the "plugins" folder, rip and move them back out. But, I hope they fix this before I need to bother with all that.
Source & Further Reading
Also see this post about elevator.exe if you're security-conscience (and you should be).
