Thank you all for the responses! You are all correct. Yes I am installing a 5G wireless network connector to my desktop. I faced a multitude of problems. I did uninstall my old connector with cccleaner and that made windows uninstaller unhappy. When I tried to use windows restore to back up a few days, it didn't help. I finally went back to basics and uninstalled the "new connector driver". I rebooted to safe mode and disabled my AVG (antivirus). Next I uninstalled Malwarebytes, Spybot, ccCleaner, and ZoneAlarm.
I uninstalled these programs one at a time and tried to install my new connector after each individual program uninstall. Finally when I uninstalled ZoneAlarm and went through the Mediatec connector setup, it (the connector) worked. I rebooted back in normal mode, reinstalled the deleted programs to include Zonealarm and everything is copacetic. Now I know, I should have uninstalled the old connector through device manager> network adapters not with CCCleaner. Then I should have uninstalled Zonealarm before trying to install my new network adapter.
ps: CC Cleaner did clean up the messy leftovers from my work. Thanks also for the registry cleaning tip. I have been using CC Cleaner for several years and it is super!!