Need to delete two apps that startup on restart

I re-installed Adobe Flash Player, and along with it, two apps were installed that I don't want.  They are RegClean and PC Backup.  I inadvertedly removed them from the Control Panel's Uninstall Program link, as they would not let me remove them.  They are very bothersome to me on start-up, and do not want them at all.

This type of problem has happened in the past, and someplace there is a table that
disables and/or enables them, that will stop the startup process for them.
I simply forgot where, but I think there is a code that is entered in the startup
search window.  Can you help me ?

I have Vista on an HP laptop.  Internet Explorer is current as are Window updates.

Thanks ahead of time !