Windows 7 does not recognize the new WD external hard drive added to the usb port

Recently, I tried to add my third USB WD hard drive to my computer.  It's a My Book Essential.  The meter turns and the virtual cd drive is listed in WD, but the hard drive itself does not appear on the list of devices with a drive letter.  My my first two books are readers: J:, and L: I have no "new device found" message   I search for new devices and it the PC do not find anything.  If I click on the virtual CD drive (M :) it askes if I want the computer to allow WD to make changes...) I say Yes and the screen flashes and nothing happens.
The drive be defective?  Any other ideas?

Hello

Have you tried to connect the external hard drive on another USB port?

Try to connect the WD external hard drive on another computer.

Follow these steps:

Method 1: You can run the troubleshooter in the following article and see if this fits the Bill.

Open the hardware and devices Troubleshooter

http://Windows.Microsoft.com/en-us/Windows7/open-the-hardware-and-devices-Troubleshooter

Also, run the Fixit.
Hardware devices do not work or are not detected in Windows

http://support.Microsoft.com/mats/hardware_device_problems/en-us

Method 2: Check if the external hard drive is recognized in disk management and assign a drive letter to the same.

To open disk management, follow these steps:

a. click Start, type disk management in the start search box and press enter.

(b) if the drive is detected in disk management, I suggest you to assign a drive letter and see if that does the trick.

For instructions, see this article change, add, or remove a drive letter

Tags: Windows

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