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How to fix my usb port not recognized

My usb port is not recognized by windows,,i'll try all my best but it is nt working,,how can i fix my usb port via laptop?,,,tnx

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Go to :start->my computer->right click manage->select device manager->double click universal serial bus controllers->right click on all 6 of them and select update driver.

Posted on Apr 25, 2010

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Jan 21, 2016 | Onn Optical Mouse

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How To Fix Usb Device Not Recognized in Windows


Sometimes, when you plug a USB device to your computer you may receive a Usb Device not recognized or usb port not working pop up message. If your USB device is not detected, then we will show you how you can troubleshoot usb not recognized error.

Follow Quick Steps To Resolve Usb Not Recognized Error Windows:

Press "Windows" + "R",a run window will open
In the "Open" box of the run window type "devmgmt.msc" and press "Enter"
This will open theDevice manager
Click on the arrow besides "Universal Serial Bus controllers"
Right click on each USB port and then click on "Uninstall"
Restart your computer and wait for Windows to re-installs USB controllers.
Try to connect yourUSB deviceagain.
How To Fix Usb Device Not Recognized In Windows 7 8 1

on Jan 28, 2015 | Computers & Internet

1 Answer

The computer can not recognize drive (unknown USB device).


Method 1 - Unplug Computer So how did I finally fix the problem? Well, if you are lucky, it's a super simple solution! Try this method first and if it works, you'll have saved a lot of time.
Simply unplug your computer from the power supply. Yes that is it! Note that this does not mean just turning off your computer using the power button because most modern computers don't actually turn off completely and the motherboard will still get power. This is useful sometimes if you want to remotely wake up a computer, etc.
The motherboard is where all of hardware of the computer connects to, including the USB ports. Sometimes the motherboard needs to be "rebooted" because things can go wrong, i.e. all or some USB ports suddenly stop working. The small microprocessor on the motherboard will reload the drivers and your USB ports should hopefully be recognizing devices again.
So first turn off your computer using the Shut Down option in Windows or pressing the power button and then UNPLUG the PC from the wall outlet. Let it sit for several minutes and then plug it back in.
Method 2 - Update Device Driver If Windows is not able to recognize the device, you may also see in Device Manager that the device shows up as an "Unknown Device". You can get to Device Manager by clicking on Start and typing in devmgmt.msc or by going to Control Panel and clicking on Device Manager.
In that case, you should right-click on Unknown Device, click on Properties, then the Driver tab and then click Update Driver.

If this doesn't work, you can also try to download the driver for your device from the manufacturer's website. If the USB device is just a flash drive, then it's probably not a driver issue. However, if you are installing a USB printer, drawing pad, etc, then it might be worth downloading the driver for that specific device.

Method 3 - Restart & Disconnect USB Devices The next thing you can try is to disconnect all USB devices and then restart the machine. once you have restarted, try to connect the USB device that was causing the problem.
If that particular USB port doesn't recognize it, try another one. If the device is recognized by a different USB port, there could be a hardware problem with one of the USB ports. If no USB port recognizes the device, then keep reading because it's probably something else.

Method 4 - USB Root Hub Another thing you can try is to open Device Manager, expand USB Serial Bus Controllers, right-click on USB Root Hub and then click on Properties.
Click on the Power Management tab and uncheck the Allow the computer to turn off this device to save power box. If you have more than one USB Root Hub listed, you need to repeat these steps for each one.
Click OK and then restart your computer. Try to reconnect the USB device and see if it is recognized. If not, go back to the power management tab for each one and check the box again. If it does recognize the device, then leave them unchecked.

Method 5 - Connect Directly to PC A friend of mine ran into this issue and the cause ended up being his USB hub. He only had three USB ports on his computer, so he bought a hub where he could connect an additional 8 USB devices.
I guess this proved too much for his computer and it just started sporadically not recognizing various devices. After removing the hub and connecting the device directly to the computer, it worked just fine.
We haven't really been able to find any other solution to this problem other than reducing the number of items connected to the hub. Actually, one other solution worked, but it meant having to buy a new USB hub with more power.
If you are having this problem with Windows 8 or Windows 8.1, then you might be in luck. Microsoft has released a fix for Windows 8 not detecting USB devices properly. Make sure to install this hotfix if running Windows 8.
Method 6 - USB Troubleshooter If nothing has worked so far, you can download the Windows USB Troubleshooter Fixit tool. It's a free tool that works with Windows XP, Vista and 7.
You can either have the troubleshooter fix the problems for you or select the fixes yourself. I would just let it fix them for you since the choices can sometimes be confusing and technical for the novice user.
Method 7 - Update Generic USB Hub If you are getting the Unknown Device error in Device Manager, you can also try one other thing. Open Device Manager and then expand Universal Serial Bus Controllers.
You should see at least one item called Generic USB Hub. On some computers, you might see two, three or more of these. Right-click on the first one and choose Update Driver Software.
When the update dialog pops up, choose Browse my computer for driver software.
When the update dialog pops up, choose Browse my computer for driver software.

Jul 10, 2015 | Transcend StoreJet 25 750GB USB Hard Drive

2 Answers

Get usb ports to work


Usually you don't need to do anything for any Windows to recognized the USB Ports. I will say that if the for instance a flash drives is not seen that you make sure that works in another PC.
Sometimes Windows gets confused if many USB devices were used and then removed. Eventually it will stop recognizing anything that is inserted. If you know how to use the registry you can fix it but if you don't better not try it. Your other option is to re-install Windows.
As a technician I could some other things before re-installing so I will leave like that for now.

Nov 28, 2014 | IBM Lenovo ThinkPad T400 7417 Notebook

2 Answers

My laptop is an HP Pavilion dv 8309us and when none of the 4 USB ports recognizes any device. A message appears "USB DEVICE NOT RECOGNIZE, ONE OF THE USB DEVICES ATTACHED TO THIS COMPUTER HAS...


I think the problem lies in a damaged USB controller on the laptop. The fact that none of the ports work, indicates that either the power to the ports has failed, or more likely the circuitry controlling the USB hub has failed. Sadly You will most likely need to replace the motherboard

Jul 18, 2011 | Pavilion dv8309us dv8310ca dv8310tx...

1 Answer

All USB ports on my emachines T6542 do not work


try to see the BIOS SET UP if the USB port are in enbled status..

if its not,, enabled them...

and see the connection of the USB port into your motherboard if it connect properly..

Oct 27, 2009 | E-Machines eMachines Desktop PC

2 Answers

ALL uSB Ports stopped working


If new BIOS will not help, then
Motherboard needs service.

Dec 29, 2008 | HP Pavilion dv9000z Notebook

1 Answer

USB Ports on AL27 only work with printer and external hard drive.


I fixed the problem by going to "Device Manager," then to the "Universal Bus". Under "Universal Bus" are a list of the individual USB ports. You have to delete each one individually. When you delete each one, a window opens up which gives you various headers; select "drivers" and hit "uninstall". When you hit "uninstall", windows will ask if you want to proceed. Select "Yes". You'll then get a "warning" that the computer may not work correctly if do this procedure. You want to proceed with the deletion of each Universal Bus port. Once you've removed the Universal Bus ports, then reboot windows. Windows will detect the individual Bus ports and find new drivers for them. Once the drivers are installed (automatically by Windows), the USB ports will be operational.

Nov 15, 2008 | Sharp Actius AL27 Notebook

1 Answer

Usb port


Probably they didn't set up the front USB ports when they were wiring the computer. If you have the motherboard schematic it will show where the front USB ports connect on the board. Best have a technician take a look at it to determine and hook it up.
Hope this is of some help. Bud

May 05, 2008 | Computers & Internet

1 Answer

Usb problem


You shouldn't need the USB driver 2.0 from mercury because windows installs this with SP2. Suggest you un-install what you installed from mercury & update your version of windows (completley), through "Windows Update". Once windows is all updated & you have finished with a reboot. Plug your pen drive in a opened usb port. Open windows explorer. Scroll down & you should see an icon (left side of explorer), thats named like, Removable Disk. Give windows time to see the device. After a few minutes if your pen device does not show up try another usb port. One you know does work. If after a couple of minutes go by & you still don't see the device listed in explorer I would say the device is defective. Your Mp4 uses a cable to connect to the usb. Try connecting to another PC's usb port. It is possible the cable is dirty or bad.

Jan 13, 2008 | Mercury P4VM800M7 Motherboard

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