Sometimes insert u disk or usb2.0 mouth,ibm laptop cpu cooling fan a long time and don't show, also read out. In that case, we will check to see if the problem of the hardware or the driver.
Today three methods are given, the hope can help you solve the problem of similar.
 
1. Mortherboard BIOS setting
 
Updated mortherboard BIOS, and in the open USB2.0 Device Compatible, which increases USB2.0 equipment compatibility, that could solve part of USB equipment and NF2 motherboard compatibility problems.
 
2. Separate installation USB 2.0 drive
 
Win2000 system (old system, estimates that someone is using) : first installation SP4 patch,toshiba laptop cpu cooling fan then separate manufacturers provide installation of USB2.0 driver, can generally from the mainboard installation plate found. After the installation is complete reboot your computer, the system will find new hardware equipment, choose "show known Device drivers, choose from the list of specific driver" and click "next", then in hardware wizard select "NVIDIA USB2.0 Enhanced Host Controller" (figure 2) installation USB2.0 Bus Controller, after the success of the installation open Device manager, if in the "Universal Serial Bus ontrollers" USB Bus Controller appeared in "NVIDIA USB2.0 Enhanced Host Controller" and "USB2.0 Root Hub Device" so that the success of the installation.

WinXP system: first please upgrade SP1 patch, and then install USB2.0 drive alone,sony laptop cpu cooling fan and then restart your system, WinXP will report found that new hardware, and automatic installation. After the installation is complete open device manager, and then we found still didn't identify the USB2.0 Controller, still have to manually solve it: open the "universal serial bus Controller", in the "Standard Enhanced PCI to USB Host Controller" click the mouse button, select "update the driver". Then in "hardware update wizard interface choice inside" from a list or the designated position installation ", click "next", and then select "don't search, I choose to install driver" a, finally click on the "next", in the display compatible Device column choose "NVIDIA USB 2.0 Enhanced Host Controller" for installation, after installation system will show to continue installation "USB2.0 Root Hub Device", using the same method can be installed, thus WinXP USB2.0 drive is installed under finished. Win2003 system: the author not found in the system for the USB2.0 driver, if forcibly installed Win2000 / XP USB2.0 drive, the system can hint after the restart appear USB mistake, device manager also doesn't have "NVIDIA USB 2.0 Enhanced Host Controller" a. But this time USB devices can still use, but sometimes appear problem, such as equipment to printer can't print or locked mobile hard disk operator suddenly disappeared, and so on. The author suggest in Win2003 temporarily use under the system comes with USB drive, to launch special USB drive Win2003 NVIDIA again after the upgrade not late.
 
3. Low speed USB update
 
When we follow the above method USB2.0 driver installation, USB2.0 equipment can be well used,apple laptop cpu cooling fan but in the use USB1.0/1.1 WinXP and low speed device, there may be system can't identify situation, we can do to solve: open device manager, open the "universal serial bus controller", and then in the "Standard OpenHCD USB Host ntroller"
USB bus controller, click the button, select "uninstall", repeat uninstall two times, two USB bus controller are uninstall off (must be unloading otherwise still can't all USB1.1 equipment), and then click "scanning for detecting hardware changes" button, the system will be rescanning USB controller driver, after the scanning equipment manager will appear in the two USB Root Hub and two ndard
OpenHCD USB Host Controller, here the USB drivers WinXP installation is finished.asus laptop cpu cooling fan But low speed USB equipment problems only appear in WinXP system, if is Win2000/2003 system, won't appear USB1.0/1.0 equipment to identify problems, so no more what update.