OrientDb can be downloaded as zip, unpacked and started by executing server.bat.
Before starting it edit the file config/orientdb-server-config.xml and replace in the section users the root password.
Restart the server. The configuration file should have something like this:
You can test the connectivity by starting bin/console.bat and execute:
Firewalls & anti-viruses may block database connections. Read How to enable Firewall connections.