Ensure that Windows is fully updated. This is very important as Microsoft have identified issues with Windows which can affect the enumeration of drivers, particularly with USB devices. To install the latest updates and drivers, please visit the Microsoft Windows Update Web site: http://windowsupdate.microsoft.com
Please see below for links to Microsoft documentation regarding USB-related issues in Windows. These issues affect a wide range of USB devices from many manufacturers and not just Epson product, as the issues are related to the Windows operating system itself.
Windows 98SE, Windows ME, Windows 2000:
Windows XP: Since its first release, there have been a number of updates directly relating to the USB core components in Windows XP. Service Pack 1, for example, added USB 2.0 support.
Windows Vista: Since its first release, there have been a number of updates directly relating to the USB core components in Windows Vista. Documented problems include the example symptoms listed above as well as the system generating the following Stop error message and then automatically restarting (sometimes with a blue screen):
Stop 0x000000FE (Parameter1, Parameter2, Parameter3, Parameter4).
Windows Vista Service Pack 1 (SP1) and Service Pack 2 (SP2) contain some of these updates. We recommend viewing the following Microsoft Knowledgebase articles for update and support information:
Windows 7: For more information on keeping Windows 7 up-to-date, visit the following Microsoft website: Windows 7 Help: Install Windows updates
Windows 8: For more information on keeping Windows 8 up-to-date, visit the following Microsoft website: Windows automatic updating: Frequently asked questions