adopted.son i have absolutely no idea how all this works ( M-Audio Midisport Uno ) however it does look like you are going to need something like Audacity click here for your music.
It seems you have a lot going on here and to be honest im just trying to understand it.
First thing is stay out of the registry for now untill we can find some options for you.
I think i would start by creating a new user account with full admin rights.
And install your software that is needed and only that.
Try that and see what happens.
Sorry not a lot of use for now and others may have a better idea for you.