First, please disconnect all USB devices and then
perform the following steps:
Click "Start" button, type "devmgmt.msc"
(without quotation marks) in the "Search" bar and press "Enter".
Click "Continue" if necessary.
In Device Manager, double click to expand
"Universal Serial Bus controllers", right click on the Host
Controller, click "Uninstall" and click "OK".
Repeat the step 2 to uninstall all items under
"Universal Serial Bus controllers".
Then, restart your computer and Windows 7 will
reinstall all USB controllers automatically.
for XP or earlier
Click start right click on computer select
properties device manager scroll down universal serial bus controllers
you could see a yellow question / exclamation mark? ! or a red X
you will need to update/reinstall drivers right click
to reinstall drivers
if you can see your usb drive but its not working
ports (com&lpt) right click update driver if this
fails to fix the problem
Check the USB leads that
attach to the motherboard usually red white green black make sure they are
securely seated and have no dust build up on them dust will cause static and a
lot of unforeseen problems to a computer and its parts
Check if USB Ports Are Damaged
USB ports are an important part of your computer's hardware.
Many devices connect to the computer via USB, such as music
players, cell phones and digital cameras.
This connection lets you charge your devices and manage
files on them.
When you connect a device to a USB port, it is typically
If not, there may be a problem with the port. USB ports
sometimes fail on their own, or they may be damaged by force.
Plug a variety of devices into the USB port you think is damaged.
If none of them work, the port is probably broken.
Connect the same devices to the USB ports on a different
If they work, this is another indication your ports may be
Run Windows Update on your computer to ensure your devices
and computer function together and have the latest drivers.
Click "Start," then type "Update" in the
Click on "Windows Update," "Check for
Updates" and "Install Updates."
Open the Windows
Device Manager by clicking "Start," then typing "device
manager" into the search bar.
Click the Device Manager link when it appears.
Click on each of your USB ports.
In the Properties window, look for "This device is
If this is displayed for each USB port, they are not
damaged, but there may be a problem with your device instead.
Click "Update Driver" next to each USB port in
the Device Manager, and Windows searches for and installs the latest driver.
If one can't be found, go to your computer manufacturer's
website, and download the driver there. Try to use the USB port again.
Sometimes, outdated or damaged drivers result in a
non-working USB port.
Open your computer case by unscrewing or sliding off the
Use a can of compressed air to clean out the dust from
inside, especially from within the USB ports.
If your USB ports are hooked up to the motherboard, remove
the cable, then replace it.
These actions sometimes help to fix non-working ports.