USB Harddisk not working on dual boot windows7/8

Posted by Jesper on Super User See other posts from Super User or by Jesper
Published on 2012-12-02T05:27:42Z Indexed on 2012/12/02 11:10 UTC
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windows-7

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windows-8

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usb-storage

Yesterday I installed Windows 8 on a machine that already had Windows 7. They are on dual boot and both systems work fine. The problem is that inserting a USB hard disk in either system does nothing. If I connect a USB mouse or mobile phone, they work fine, so the USB plugs are active/working and the USB hard drives that I am trying to connect work on my other laptop just fine.

I have tried to uninstall all USB-related items in Device Manager and let them reinstall upon restart, but that didn't help. The USB drive does not show up in disk management either.

The strange thing is that it is exactly the same situation on both windows. USB mice etc. work just fine and USB hard drives do not.

Any ideas on solving this problem would be great.

...Don't know if it is important, but this is a Toshiba Tecra R950 Laptop.

EDIT: I have found out that my other USB HD (Western Digital) works on this laptop, but for my StoreJet Transcend and Adata "something" does not work. All three work on another Windows 7 laptop. Sizewise the WD is in the middle at 400 GB. The StoreJet is 640 GB and the Adata is 200 GB.

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