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<div>Replying helps further our knowledge, without comment leaves us wondering. RE: No USB 2 in XP SP1 bcastner (IS/IT--Management)15 Jan 04 07:58right-click the USB controller(s), Properties, Driver.</div><div></div><div>Click "Driver Details" and see which of three possible USB drivers XP installed. If the driver usbehci.sys is installed, it is 2.0, is usbohci.sys, it is 1.1.</div><div></div><div></div><div></div><div></div><div></div><div>If your Device Manager shows an ENHANCED USB Host Controller, the system has High Speed USB (USB 2.0) capability. </div><div></div><div></div><div></div><div>In Device Manager if you see any listing with "Enhanced" for the USB to PCI bus, it is 2.0: </div><div></div><div></div><div></div><div>Intel Enhanced PCI to USB controller</div><div></div><div>SiS Enhanced PCI to USB controller</div><div></div><div>VIA Enhanced PCI to USB controller</div><div></div><div>ALi Enhanced PCI to USB controller</div><div></div><div>Standard Enhanced PCI to USB controller</div><div></div><div>NEC Enhanced PCI to USB controller</div><div></div><div> RE: No USB 2 in XP SP1 Caitlinjo (TechnicalUser)(OP)15 Jan 04 07:59Thanks for your interest Paparazi, my Device Manager calls it, "Standard Enhanced PCI to USB Host Controller". From Microsoft's knowledge base I read that it should read, "USB 2.0 EHCI Host Controller". It is also referred to as such in the text file on the Nvidia CD that came with the motherboard, an Asus A7N8X-E. </div><div></div><div></div><div></div><div>I sent an inquiry to Asus technical support in Taiwan and received a reply that was lacking in clarity due to the language barrier. Along with the reply was a file containing a USB driver and the following directions copied verbatim and pasted below:</div><div></div><div></div><div></div><div>Fisrt please install the USB driver in the attachment .</div><div></div><div>after installation ,and reboot .</div><div></div><div>please enter windows--control panel--system--hardware--device manager--univerail serial bus controller,</div><div></div><div>then update the item" Standard enhance to USB controller" driver , and manually specify it to</div><div></div><div>"nvidia USB2 enhanced host controller" , then OK .</div><div></div><div>sometimes you must re-do all steps again if your usb 2.0 driver can't use still.</div><div></div><div>if your usb 1.1 can't run after this,please delete the usb1.1 controller items and fresh</div><div></div><div>again.</div><div></div><div>all will be ok!</div><div></div><div></div><div></div><div>I sent a follow up email requesting clarification but have yet to receive a reply. If you or anyone else can decipher the above directions I will be delighted to hear your interpretation. I did install the driver but have no idea where to direct the driver upgrade wizard for the needed file(s). </div><div></div><div></div><div></div><div>I became aware of the problem when transferring a multitude of files from the hard drive to a portable USB flash drive. The transfer was incredibly slow, the flash drive is USB 2 certified so I began investigating my operating system. I had no idea I was opening a can of worms, but it has been done and I am up to my ears in worms until the answers come my way.</div><div></div><div> RE: No USB 2 in XP SP1 Caitlinjo (TechnicalUser)(OP)15 Jan 04 08:15Dear Bcastner,</div><div></div><div></div><div></div><div>Is there anything about computers you don't know? The driver is indeed "usbehci.sys", and the reference is "Standard Enhanced PCI to USB controller." It seems that I have been wading in muddy waters again for no valid reason, other than to chalk it up the "the school of hard knocks." </div><div></div><div></div><div></div><div>While checking your reference to the driver file's proper name I also checked the "Standard OpenHCD USB Host Controller" and found the driver file to be usbohci.sys (1.1) just as you said it would be.</div><div></div><div></div><div></div><div>Once again I thank you for your diligence and once again send you a red star. RE: No USB 2 in XP SP1 paparazi (TechnicalUser)15 Jan 04 11:12Whilst accepting everthing that bcastner has said to be true (on the same lines as my thoughts but as usual much more eloquently put) </div><div></div><div>I am still intrigued as to what this additional driver was (bearing in mind that you must have told Asus support that you were already using XP with installed SP1) and that they told you to quote: </div><div></div><div>Update the item" Standard enhance to USB controller" driver , and manually specify it to "nvidia USB2 enhanced host controller"</div><div></div><div>Presumably updating with their supplied driver.</div><div></div><div>So what was this driver?</div><div></div><div>If in your device manager it already said "enhanced" why did they advice you to update the driver with one they supplied??</div><div></div><div>Very interesting.</div><div></div><div>Certainly would help if it actually said USB2 somewhere!!!</div><div></div><div> Martin</div><div></div><div> Replying helps further our knowledge, without comment leaves us wondering. RE: No USB 2 in XP SP1 bcastner (IS/IT--Management)15 Jan 04 11:40Martin,</div><div></div><div></div><div></div><div>This perhaps, (as linney referenced above):</div><div></div><div> =kb;en;82...</div><div></div><div> googletag.cmd.push(function() googletag.display('div-gpt-ad-1406030581151-2'); ); Red Flag This PostPlease let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.</div><div></div><div>CancelRed Flag SubmittedThank you for helping keep Tek-Tips Forums free from inappropriate posts.</div><div></div><div>The Tek-Tips staff will check this out and take appropriate action.</div><div></div><div></div><div></div><div></div><div></div><div>standard enhanced pci to usb host controller driver windows 8.1 download</div><div></div><div>Download: https://t.co/jlpHqKgYT7 </div><div></div><div></div><div>When I right clicked uninstalled the Intel usb 3.0 extensible host controller, I lost all mouse and keyboard access and had to safe boot and revert to last know working settings (I still cannot use USB 2.0 at all). I'm concerned that I my uninstall one of the drivers and lost access to the keyboard and mouse forever - no ability to lose use the keyboard in safe mode.</div><div></div><div></div><div>Also, I'm now receiving the "Power surge on hub port" error message again. Previously I had never, ever received this message until I installed the USB 3 extensible host controller driver. Since I have no USB 2 right now, I can't plug the keyboard/mouse into the usb 2 and until/reinstall the USB 3 drivers.</div><div></div><div></div><div>I reinstalled Win 7 all drivers. The USB 3.0 drivers again prompted the "power surge" message. It is noted on the Intel DL page to revert back to last known working settings after installing this driver. It seems below standard as there are many instances of error from this driver with a simple google. Reinstalled Win 7 again and all drivers except USB 3.0. Went into Device Manager and updated some devices.</div><div></div><div></div><div>In addition to the USB protocol, there is a second specification for the USB host controller, the piece of hardware on the PC to which a device is connected. The Host Controller Interface specification defines how host controller hardware and software interact. The eXtensible Host Controller Interface (xHCI) defines a USB 3.0 host controller. The Enhanced Host Controller Interface (EHCI) defines a USB 2.0 host controller. The Universal Host Controller (UHCI) and the Open Host Controller (OHCI) are two, alternate implementations of a USB 1.0 host controller.</div><div></div><div></div><div></div><div></div><div></div><div></div><div>If the PC has USB 3.0 ports and is running a version of Windows earlier than Windows 8, the host controller drivers are provided by the PC manufacturer. If you need to reinstall those drivers, you must get them from the manufacturer.</div><div></div><div></div><div>In Windows 8, the Microsoft-provided set of USB 3.0 drivers (USB driver stack) work with most host controllers. Microsoft USB 3.0 driver stack does not work with the Fresco Logic FL1000 controller. To determine if you have an FL1000 controller, open Device Manager and expand Universal Serial Bus controllers. View the controller properties by selecting and holding (or right-clicking) the controller node. On the Details tab, select Hardware Ids property in the list. If the hardware ID starts with PCI\VEN_1B73&DEV_1000, it is the FL1000. For that controller, download and install drivers from your PC or controller card manufacturer.</div><div></div><div></div><div>In addition to the USB devices that you connect to your PC, there are a number of devices integrated within the PC that might be connected over USB, such as a webcam, fingerprint reader, SD Card reader. To connect all of those devices and still provide external USB ports, the PC supports several USB host controllers.</div><div></div><div></div><div>The USB 3.0 xHCI host controller is fully backwards compatible with all USB device speeds, SuperSpeed, high speed, full speed, and low speed. You can connect any device directly to an xHCI controller and expect that device to work. For EHCI controller, that is not the case. While the USB 2.0 specification supports all speeds of devices, the EHCI controller only supports high-speed USB devices. In order for full speed and low speed USB devices to work, they must be connected to the EHCI controller through a USB 2.0 hub, or they must be connected to a UHCI or OHCI Controller.</div><div></div><div></div><div>While xHCI host controllers work with any speed of device, a SuperSpeed hub only works with SuperSpeed devices. To ensure that USB 3.0 hubs can work with all speeds, they have two parts: a SuperSpeed hub and a USB 2.0 hub. A USB 3.0 hub is able to support all speeds by dynamically routing devices, to the SuperSpeed hub or 2.0 hub, based on device speed.</div><div></div><div></div><div>A different set of binaries is loaded for each type of host controller. It's important to understand that the USB driver stack that Windows loads correlates to the type of host controller, not to the connected device's speed.</div><div></div><div></div><div>If the PC's USB 2.0 ports use a companion controller, the host controller to which the port is routed depends on device speed. For example, a low speed device connects through a UHCI or an OHCI controller, and uses the USBUHCI or USBOHCI driver. The PC routes a high speed device to an EHCI controller, therefore, Windows uses the USBEHCI driver.</div><div></div><div></div><div>Different device speeds do not determine the driver that is loaded for the controller. However, different device speeds might determine which controller is used. The controller always uses the same driver.</div><div></div><div></div><div>In Windows 8, first, make sure that you have a USB 3.0 port and an xHCI host controller. If your SuperSpeed USB device is connected to the xHCI host controller, Windows 8 shows a "Connected to USB 3.0" message in specific portions of the Windows 8 UI. If the device is connected to an EHCI controller instead of your XHCI controller, the messages will instead read, "Device can perform faster when connected to USB 3.0".</div><div></div><div></div><div>Update the BIOS for your system by obtaining the latest version from your PC maker. On some motherboards, the BIOS can incorrectly route a device that is connected to an xHCI host controller to an EHCI controller. That incorrect routing forces a SuperSpeed USB device to operate at high-speed. A BIOS update can fix this problem.</div><div></div><div> df19127ead</div>
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