The first thing to try is to right click the Epson scan icon, and select to run as administrator. This works for some people.
If that fails the second thing to try is to uninstall and reinstall all your Epson scanner software. Make sure Windows is completely up to date. Switch off the printer/scanner and uninstall the driver. In control panel/printers and scanners/ right click the scanner and select delete. Download the latest driver from the Epson website for your country. During the install you will be prompted to turn on the scanner/printer.
If that fails there is a registry hack you can try. But hopefully you can avoid that.
Kind regards
Chris