@ Tech: I don't know, if it's possible, but I use "Daemon-Tools" for my virtual drives and when I install it (the setup.exe) the readme-info tells me something about problems when a debugger is used for debugging programms (if I remember right)!
I allways thought it's only important for "Visual-Studio" etc., but I also can't debug my DB-Pro-Porgramms (I get a "Just-In-Time-Debugger"-Visual-Studio-Message asking me, if I want to start a new Instance of Visual-Studio to debug "DBPCompiler.exe")! (I haven't tried yet to uninstall "Daemon-Tools", cause I use it often and I was able to solve my problem so far without the Debug-Mode!) Maybe it helps you, maybe not?!