Oracle19C installation is stuck at executing datapatch in Windows 10 using dbca
Make sure that the user installing the software is in the local ora_dba group, and that os authentication is enabled in sqlnet.ora:

SQLNET.AUTHENTICATION_SERVICES = (NTS)


Also, it is a good idea to make sure that any anti-virus software doing active scanning is disabled during install/db create activity, and that when running it contains exceptions for all Oracle-related files and directories.