Oracle 19c won’t install – Super User

Kind of a mess here. Did two successful successive installs of Oracle 19c database and now no Oracle database will install on my Windows 10 Pro machine. Found that installing Oracle Developer Tools for Visual Studio 2019 somehow wiped out my previously working Oracle Database install. After I installed Oracle Developer Tools, sqlplus stopped working. Sql Developer wouldn’t connect, and c# programs that previously read the local Oracle wouldn’t work. One install/uninstall (19c has only a manual uninstall) cycle was successful but now Oracle 19c won’t install at all. It asks to be admin and you see a brief flicker of the install gui, and then it stops. Quits so fast I’m not sure there’s a log file anywhere. Got so desperate I tried Oracle 18c but that fails quickly too. Any reset possible short of reinstalling Windows 10?