My usb port is nt working ...it is not detecting any device (keyboard or mouse and etc).when i look for the problem in the device manager it is showing that driver for the usb hub is missing ,,plzz help me as soon as possible
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Re: usb not working
Hello check that the USB Port is connected correctly plugged into the motherboard For your OS first install the latest Service packs available Re-install the USB2.0 Drivers Connect the KB and mouse to the corresponding USB's Restart the system.
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I'm assuming that your keyboard and mouse are wireless versions. You should therefore have a wireless controller plugged into one of the USB ports, probably at the back of the PC. Try removing the wireless controller and install it in a different USB port. The Windows operating system should detect it as a new device and attempt to install the drivers automatically.
Please add more information to get specific assistance. Are these wireless devices? If wired, do they use USB or PS/2 connections.
For wireless devices, try replacing the batteries and resynching to the receiver. (You may want to check putting the receiver in different USB ports.)
For wired devices, disconnect and reconnect. For PS/2 devices, you will need to restart the computer to check if the devices work. For USB devices, try connecting to different USB ports.
Next step, try using a different keyboard and mouse (that work on another computer (stick to USB or PS/2 to match the current pair)). Try a wired set if the problem is with a wireless pair. If those work, continue diagnostics on the wireless keyboard and mouse. Check if the mouse and keyboard work on another computer. If they don't work with another computer, replace them.
If another USB keyboard and mouse pair don't work in any port, your USB ports may have failed. Check if even one port works enough to access the Device Manager. (Start > Control Panel > Hardware and Sound > Device Manager (Win7); similar directions in other versions of Windows) Check for a problem with the drivers (For USB ports, scroll down to the USB drivers and look for a triangle with a yellow exclamation point or red x). Try to update the driver or roll it back. If that doesn't help and one USB port works, a USB hub may solve the problem.
Otherwise if the USB or PS/2 ports do not work with any devices and the driver fix doesn't work, then I'd suspect a problem with the ports on the motherboard. Replace the motherboard/computer.
Ok I think the best method to "Fix" this would be to get your self a 4 - 5 port USB card, they are, real cheap, insert it into a spare slot, inside your PC, and install the drivers, if any, and use that one. And simply ignore the other one all together.
If your mouse and keyboard work properly with another computer or laptop the problem could be :
A) if devices are USB :
- defective USB port : chose another USB port;
- USB port inactivated in BIOS : check and activate;
- motherboard defective : replace motherboard.
B) if devices are PS/2 :
- damaged PS/2 ports : buy a PS/2 to USB adapter for your mouse/keyboard or buy USB mouse and keyboard;
- motherboard defective : replace it.
You have provided very vague details of your problem.
It would be useful if you listed the details of your system, including your operating system (XP. Vista etc,) Also the manufacturer and model numbers of the mouse and keyboard you are having trouble with.
For cordless peripherals you should have followed the instructions for synchronising their RF signals with the receiver and make sure your batteries in the keyboard and mouse are in good condition.
Next thing to try is unplugging, wait 20-30 secs and replug your mouse and keyboard receiver.
If that doesn't help then force a driver re-install by doing the following: I will assume you are using a version of Windows - Access the device manager - you should find it by a right click (I assume you have an alternative mouse available) on the Computer icon on the desktop then select properties (or go via the Start Menu and use the Control Panel).
Locate the entry for "Mice and other pointing devices" and select and remove (delete) the entries within that section. Do the same for the Keyboard section within Device Manager.
When you have done this reboot your system, the drivers for your mouse and keyboard should be re-detected and installed with their default settings.
If its an USB keyboard and mouse, try to insert keyboard in upper port and mouse in lower port USB.
Sometimes when they Both are inserted in port in same line, they are unable to Fetch equal amount of power.
Try this and do restart your computer, after inserting them in USB ports.All the Best
Perhaps its the drivers for the USB ports. Do you have or can you borrow a serial mouse and keyboard (PS/2 style)? If not, perhaps a local computer store may have an adapter to convert your USB devices to PS/2. Look at this site to get a visual of the device I am talking about: http://sewelldirect.com/ps2tousb.asp
This will allow you to bypass the USB portion of your computer and allow you to make the necessary changes in BIOS or to see if it is indeed a driver problem.
Unplug the USB cable associated with the keyboard and mouse while the computer is still on. Plug it back in to a different USB port. This should cause Windows to re-detect them and reinstall the drivers automagically. Let me know if that works.