MSI Afterburner - If you launch the app, there is a little startup text with a windows logo underneath that. Click on it until it appears red. This should work, some people have issues with this, if it dosen't work there isn't much to do
Riva Tuner - I have never used this app, although i can take an educated guess it is in the setting's of the application. I have seen threads when people complain about this app for startup issues, so as i said above " if it dosen't work there isn't much to do "