Según la página oficial de Epson, el driver ya está incluido en el propio Windows 7 (no tienes que descargar e instalar ningún package o software):
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.
- Make sure your computer is connected to the Internet.
- Click and select Devices and Printers.
- 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.
Aqui tienes el link de Epson: https://epson.com/Support/Printers/Single-Function-Inkjet-Printers/Epson-Stylus-Series/Epson-Stylus-C42UX/s/SPT_C11C482001?review-filter=Windows+7+32-bit