I'm sorry about the issue. Did you install any Epson driver / software on your new HP computer?
Is the printer connected to the computer with a USB cable? Or is the connection wireless?
Can we do a remote support session, so I can troubleshoot the issue directly on your computer together with you?
Please reply at the box below. Thank you,
Please let me know when you are available, so I can connect remotely to your computer and fix.