Status update, Dell-Cares resolved this by using a remote session with the original poster. Please use Get Help Now if you're having trouble with SupportAssist.
I have an ALIENWARE AURORA R11 desktop and I had a problem updating Support Assist so I followed other posts about uninstalling it and reinstalling, but now every time I attempt to reinstall it gives a failed to install message.  I have followed every suggested solution on numerous forums.  None have been successful.    
Another SupportAssist installation failed.