I had a computer audio interface that I uninstalled. It has left keys in the registry that I want to delete. However I can't, they are owned by trustedinstaller and no matter if I log in as adminstrator or whatever else I do I can't set permissions on the keys so that I can delete them. I tried using psexec to start regedit but this didn't work either. How do you change permissions on keys owned by trustedinstaller? Any help hugely appreciated.