Win 7 desktop not detecting external USB HDD

December 18, 2010 at 02:38:15
Specs: Windows 7, acer aspire m1610
i was converting some movies from mkv to avi, and because it was using a lot of cpu resources it was running very slow so when my wife decided to watch a different movie the pc was taking a long time to respond so she decided to turn off the pc by pushing and holding the on button (i think thats called "soft off" but not sure). now the pc is not detecting my external hard drive or my broadband dongle but it does detect my epsom printer (all of which is connected to my pc via usb).
now ive tried the following:- turning off the devices, rebooting the pc, using different ports and even restoring pc to an earlier date but nothing is working.
i know the hard drive is working because ive plugged it into my daughter laptop and is working fine.
now ive ran out of ideas
many thanks in advance

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December 18, 2010 at 04:06:34
Hey mate,

I have had a look around and I can't find any appropriate drivers for the motherboard. Can you please click start, and right click on 'Computer' and select properties. When you get the window, on the left hand side, there should be a 'Device Manager' link. Please open this and see if there are any devices listed under the 'Other Devices' tree.

Also, can you please tell me what (if any) devices are listed under the 'Universal Serial Bus controllers' tree, and we will see what we can do.

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December 18, 2010 at 12:21:15
First theres not a section "other devices" in device manager
Second the following are listed under USB Controllers

2 of "SiS 7001 PCI to USB Open Host Controller"
1 of "Standard Enhanced PCI to USB Host Controller
2 of "Unkown Device" which i thint is my external HD & my Broadband Dongle
1 of "USB Mass Storage Device"
3 of "USB Root Hub"

Hope this helps

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December 18, 2010 at 13:27:56

Right click SiS 7001 PCI to USB Open Host Controller, and click 'Update Driver Software'. See if this works. Otherwise, right click and uninstall. It will now appear in other devices. Right click and Install on this and Windows should find the driver and reinstall.

Let me know how you go!


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Related Solutions

December 19, 2010 at 00:34:40
tried what you suggested still no joy
thanks for the suggestion
would reinstalling windows do it?

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December 19, 2010 at 01:26:29
I would say that re-installing the OS would fix it. It would replace all the drivers, including USB. Just make sure you do a clean install, not an upgrade or repair.

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December 21, 2010 at 15:30:09
ive just done a clean install but still no joy
someone told me it could be a "USB PCI CARD"?????
what do you think?

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December 21, 2010 at 17:52:05
You don't need to re-install the operating system, if some USB devices are working fine.
The drivers for USB 1.x are installed automatically by the operating system.
The drivers for USB 2.0, if your mboard supports USB 2.0, are built into Windows 7 , but the main chipset drivers for your mboard must be installed, in order for the USB 2.0 support to be installed in Windows.

You probably need to plug the external drive and/or the bluetooth dongle, or both into different USB ports than you have them in now.

Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:

Check that out first.

Rarely, not all the ports on the back of a desktop case may be able to supply 500ma each.

If you have a desktop computer, Note that I answered a Topic on this site recently where a guy had an external drive, which does require the full 500ma, connected to a port on the back of a desktop case - it would not work properly when a webcam was in the port next to it, but it worked fine when the webcam was unplugged. Ports on the back of a desktop case often have two ports connected to the same USB controller module that are ports one above the other - you could try connecting the cable to one of those and leaving the other un-used.

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December 25, 2010 at 15:46:37
guss what, thursday we ran out of electric & when we put the electric key in, the computer rebooted and hey presto everything was working again, external hd, broadband dongle, printer & my memory stick.
thanks for the advice tho

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December 26, 2010 at 10:40:35
Huh ?

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December 27, 2010 at 05:38:20
happy new year to you all

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