Problems
1. Sticking keys

2. Wrong characters appear when typing. ?

• 3. Multimedia Keyboard buttons not working. ?
• 4. Setting a multimedia button produces an illegal operation error message. ?
• 5. Internet Keyboard buttons not working. ?
• 6. Onscreen messages do not appear when pressing multimedia keys
  
  Fix Unknown USB device:
  If you are experiencing any of the problems above, the following steps should help:
  
A: An improper connection is the most common problem when faced with a non-working keyboard. Try reconnecting the keyboard and restart the computer.

B: Turn off the system. Unplug the keyboard connect and inspect for any bent or broken pins. If the pins are bent, then it is possible to gently straighten them using the tip of a ball point pen or mechanical pencil. If the pins are broken, then replacement of the keyboard may be necessary.

C: Try updating the device driver. Visit the manufactures web site for the latest driver available for your keyboard make and model.

D: While at the manufactures web site. See if there are software patches or updates available for your keyboard. If there are, go ahead and install them as well as the updated driver.

E: If you are using a multi-media type keyboard, be sure to delete the software before installing any new drivers for this type of keyboard. Download the updated driver from the original manufacturers, and then re-install the keyboard software. If any software updates or patches are available for your multi-media keyboard, install them at this time.

Note:

Download : If you can not download the driver, you can search it from the original driver database.

Uninstall : If you are an advanced PC user, you can delete the keyboard software by using Add/Remove Programs. If you can not handle this, you can use Driver Checker to simply remove it from the list.

If you receive a prompt asking if you would like to remove all shared files, answer "No to all". Then click OK.