ORA-01017 connecting to example schemas on Oracle VM appliance from Windows host
Do you have Oracle XE or any database running in your host and listener is started as a service in your Windows host? Probably it is trying to connect there. If you have mapped 1521 from your host to 1521 to your guest, just make sure in your host there is no listener service running. If it is running change you port forwarding to 1522 ( Recommended )or something or uninstall the listener running in 1521 ( Don't seem like a wise thing to do :-) )