How do I access my external hard drive when the drivers won’t install?

April 20, 2014
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My external hard disk (1 TB) is not detected on my laptop but works in every other laptop.

In devices & printers, it’s showing with yellow exclamation in properties. It displays the following:

“The drivers for this device are not installed. (Code 28)”

Access is denied. I tried almost every thing but with out success. Please help me!

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  1. Oron J
    April 21, 2014 at 10:12 am

    I agree with Hovsep. Remove the USB root hubs and restart the computer. The hubs should be detected automatically and you can then plug in the HDD and see if it is detected. ]

    If the hubs are shown as working (after the restart) but the HDD is still not working properly, it could be the "USB Mass Storage" driver is corrupt. You can test for this by plugging in a USB flash drive and see if it works properly. If not, run the troubleshooter as suggested by Hovsep.

    Finally, it is also possible, if it's a portable hard drive without its own power adapter, that the USB port on your laptop is not providing enough "juice" to power it, and this can lead to "half working" situations such as what you describe. I've seen this happen on older laptops, but even on a new HP laptop. So, one thing you could try is to plug it into each and every one of the USB ports on your PC and see if it makes a difference. If this doesn't help, you can either get a power adapter for your hard drive (most have a small connector for one) or a USB Y lead, which will aggregate the power from two USB sockets to provide enough for the hard drive. You can get such leads on eBay quite cheaply -- just make sure they have the right connector to plug into your hard drive!

  2. Hovsep A
    April 20, 2014 at 8:12 pm

    Code 28: The drivers for this device are not installed
    http://technet.microsoft.com/en-us/library/cc731268(v=ws.10).aspx

    Open the Hardware and Devices troubleshooter
    http://windows.microsoft.com/en-us/windows7/Open-the-Hardware-and-Devices-troubleshooter

    to device manager and uninstall all of the USB Root Hubs. Reboot and they will reinstall automatically.

    it can be BIOS problem, you can try to update it
    try yo reset cmos battery, unplug the laptop from the wall, remove the laptop battery, remove the cmos battery for 1h. Before this go to device manager and uninstall the external hard drive driver (do not delete)

    What to do when a device isn't installed properly
    http://windows.microsoft.com/en-US/windows7/What-to-do-when-a-device-isnt-installed-properly

    System Update Readiness Tool for Windows 7 for x64-based Systems
    http://www.microsoft.com/en-us/download/details.aspx?id=20858