Common USB issues and the notorious Device malfunctioned / not recognised error

Usb technology  is just a decade + years old and people do face plenty of problems with it.

Points to remember
USB 1.1 12MBit per second
USB 2.0 “high speed” 480MBit per second

If  NO USB Controller is detected u have mostly not enabled it in the BIOS. Else the controller on ur motherboard is damaged.

Firstly most problems are associated with the front USB and most often then not it is cheap front usb connectors  or cables  in the ur cabinet , that are damaged or rusted or worse defective or broken . Replacement is the only solution in this case.

wiki usb

* wiki pic

The other problem is the bad assembler/ computer maker who has reversed polarity on the front usb , rendering all small usb devices like USB Mouse , USB Flash drive etc that you attach to them DEAD.

USB 1.x/2.0 cable wiring

Pin Name Cable color Description
1 VCC Red +5 V
2 D− White Data −
3 D+ Green Data +
4 GND Black Ground

My advise from personal experience , when in doubt use the back panel USB , else risk damaging that device. This is especially useful when using a friends computer.

Sometimes USB Ports play tricks on you giving u errors like

USB Devices Not Recognized /USB Device malfunctioned.

This is a notorious error and pinpointing the problem can be a nightmare.

Chk the device if it is working, if not :

Unplug the USB device, and then plug the device back into the computer or hub. If your computer still does not recognize the device, try it on another port , preferably the back port.

Else try unplugging the USB device and restarting the computer. Then, when the computer is completely booted plugging it in after 20 seconds works.

Most likely it could be because the usb device u had plugged in was bad. and all that is needed is a refresh.

MS support also recommends

Method 1: Initiate recognition of the USB device by using Device Manager

  1. Click Start, click Run, type Devmgmt.msc, and then click OK. The Device Manager window opens.
  2. Click to select your computer as the location for the scan.
  3. On the Action menu, click Scan for hardware changes.Windows XP recognizes the new device.
  4. Close the Device Manager window.

If this method resolves the issue, you are finished.

Method 2: Disable power management of the USB hub

// Note If you perform the following procedure, you may also reduce the battery life on a portable computer.

Use this method if method 1 does not work. To disable power management of the USB hub, follow these steps:

  1. Click Start, click Run, type Devmgmt.msc, and then click OK. The Device Manager window opens.
  2. Expand Universal Serial Bus controllers.
  3. Right-click a USB Root Hub in the list, and then click Properties. The USB Root Hub Properties dialog box is displayed.
  4. Click the Power Management tab.
  5. Click to clear the Allow the computer to turn off this device to save power check box, and then click OK.
  6. Repeat steps 3 through 6 for each USB Root Hub in the list.
  7. On the Action menu, click Scan for hardware changes.Windows XP recognizes the new device.
  8. Close the Device Manager window.

If  it still doesnt work, check  if all ports give the same error. If so it could be a controller problem which will nead motherboard repair or a windows problem, which is sometimes sorted by switching off and unplugging ur pc and resetting ur cmos (and reinstalling ur usb drivers if necessary).

There are other workarounds like regediting but u can search for those.

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