Oracle 19c installation stuck at creating and starting oracle instance I'm trying to install oracle 19c but it's stuck at 52% for over 7 hours. So cancelled it and uninstalled it. I have started installing again but still stuck at 52% that is in creating and starting oracle instance.
Two of the most common reasons for the Oracle DB installation to get stuck at this point are:

inability to write to %TEMP% directory (usually as a result of AD domain policies or a full disk)
virus check software (other than Windows Defender) interfering with the installation process

If you need to cancel the installation and try again, be sure to confirm that the %TEMP% directory on your Windows box does not have any leftover directories prefixed with deinstall, OraInstall or CVU, as these may be reused by future installations, creating a different set of issues.