From Epson Support - please follow these instructions:
Windows 7 printer drivers for this model are included in the Windows 7 operating system. Follow the instructions below to install the Windows 7 printer driver.
Make sure your computer is connected to the Internet.
Click and select Devices and Printers.
Select Add a printer.
Select Add a local printer or Add a network, wireless or Bluetooth printer.
Choose your printer port.
Click Windows Update and wait for the printer list to update. The update may take a few minutes.
Select EPSON as the Manufacturer, then scroll through the list of Printers and select your printer. Follow the on-screen instructions to complete the driver installation.