SOLVED:USB PORT NOT WORKING

If you quickly and repeatedly insert
and remove a USB device, the USB
port may stop responding. When the
port is in this state, it no longer
recognizes any USB device, and the
USB device will not work. This tutorial will help you fix that problem.

To fix this problem, use the following
methods in the order in which they
are listed. After each method, check
the USB device to see whether the
problem is fixed. If the problem is not
fixed, try the next method. This article also includes a
workaround that you can try if these
methods do not work.

Method 1: Use Device Manager to
scan for hardware changes Use Device Manager to scan for
hardware changes. After your
computer scans for hardware
changes, it might recognize the USB
device that is connected to the USB
port so that you can use the device. To scan for hardware changes,
follow these steps: 1. Click Start, and then click Run. Note If you are running Windows Vista, click Start, and then use the Start Search box.
2. Type devmgmt.msc, and then click OK. Device Manager opens.
3. In Device Manager, click your
computer so that it is highlighted. 4. Click Action, and then click Scan for hardware changes .
5. Check the USB device to see whether it
is working. If scanning for hardware changes
fixed the problem, you are finished.
If this method did not fix the
problem, go to Method 2.

Method 2: Restart the computer If scanning for new hardware did
not fix the problem, try restarting
the computer. After the computer
has restarted, check the USB device to
see whether it is working. If restarting the computer fixed the
problem, you are finished. If this
method did not fix the problem, go
to Method 3.

Method 3: Disable and re-enable the
USB controller Use Device Manager to disable and
re-enable all the USB controllers. This
lets the controllers recover the USB
port from its unresponsive condition.
The USB controllers represent the USB
ports in Device Manager. To disable and re-enable the USB
controllers, follow these steps:
1. Click Start, and then click Run. Note If you are running Windows Vista, click Start, and then use the Start Search box.
2. Type devmgmt.msc, and then click OK. Device Manager opens.
3. Expand Universal Serial Bus controllers . Note You might have to scroll down the list to find this item.
4. Right-click the first USB controller
under Universal Serial Bus controllers , and then click Uninstall to remove it.
5. Repeat step 4 for each USB controller
that is listed under Universal Serial Bus controllers .
6. Restart the computer. After the
computer starts, Windows will
automatically scan for hardware
changes and reinstall all the USB
controllers that you uninstalled.
7. Check the USB device to see whether it
is working. If the USB port recognizes the device
and if you can use the device, you
are finished.