Standard Enhanced PCI to USB Host Controller Free Microsoft Windows 98/2000/XP/NT 4 Version 5.1.2600.0 Full Specs Visit Site External Download Site Clicking on the Download Now (Visit Site) button above will open a connection to a third-party site. Download.com cannot completely ensure the security of the software hosted on third-party sites. Publisher's Description From Microsoft: Standard Enhanced PCI to USB Host Controller. OS installed driver. For information only. What do you need to know about free software?