External hard disk not being recognized by window [Closed]

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Hello,
just yesterday my 1 terra bite western digital external hard disc is not being recognized by my dell computer


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Monday February 6, 2017
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May 19, 2017
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1] A simple restart of the Windows computer can sometimes solve this problem. Unplug your USB, restart you computer and plug in and see if it works now. If it does not, shut down your computer, wait for a few minutes and then start your computer again.

2] To avoid a possible conflict between two connected USB Devices, disconnect your other USB’s, connect this one and see if it helps.

3] Run devmgmt.msc to open Device Manager. Under Action tab, select Scan for hardware changes and see if it helps.

4] From the Device Manager, under USB Root Hub Properties, uncheck Allow the computer to turn off this device to save power. See if this helps. If not check it back again.4] From the Device Manager, under USB Root Hub Properties, uncheck Allow the computer to turn off this device to save power. See if this helps. If not check it back again.

5] Run the Hardware and Device Troubleshooter or the Windows USB Troubleshooter and check if it helps. The automated tools check the hardware or USB connected to the computer for any known issues and fix them automatically.

6] If you are using Windows 8, Windows 8.1, Windows Server 2012 R2 or Windows Server 2012, there is a specific issue that affected this version of Windows. This could happen, if your USB port gets disabled after you safely remove the device from the port. Download and request a hotfix from KB2830154 if you face this issue.
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  • Click on Start --> Run ---> type diskmgmt.msc and click on OK
  • Right-click on WD Passport Drive --> Select "Change Drive Letter and Paths..." --->
  • Click on "Add" button ---> Select your drive letter and click on OK
  • Note : If the drive letter is already assigned, then try changing the drive letter by clicking on the "Change" button instead of "Add" button in the above step
  • If the problem still persists:
  • Click on Start --> Run --> type regedt32 and click on OK
  • Registry Editor will be opened
  • First backup your registry by going to File --> Export
  • Then expand the following key:
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967- E325-11CE-BFC1-08002BE10318}
  • If you see any upperfilter or lowerfilters entries at the right side, simply delete them.
  • Close the registry and restart your PC.