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Hello, my usb hub does not work on one of my windows 7 machines, saying it cannot find drivers, even though usbhub.sys is already in the drivers folder. Both my other Win 7 machines have no problems. I noticed that the usbhub.sys file is smaller on the machine that doesn't work

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Click start control panel administrive tools ,computer management ,device manager scroll down universal serial bus controllers you should see a yellow question mark?
right click to reinstall drivers or
if you can see your usb drive but its not working
ports(com&lpt)right click update driver
check the USB leads that attach to the motherboard usually red-white-green-black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems for a computer and its parts also
scroll to disk drives if you can see your drive + to expand right click you should see options to update driver,disable,uninstall scan for hardware changes. or
select properties you should see options in the general tab to troubleshoot,policies,volumes,driver and details under the driver tab you will have the options to check the driver details,update driver,rollback driver or uninstall
hope this helps

Posted on Mar 18, 2011

  • davekaul Mar 18, 2011

    Thanks for the help but this problem is too deep. I went through all that before. The only thing I noticed was the usbhub.sys file is smaller on the broken machine than on the 2 working files. I copied the working usbhub.sys to the non working machine and that messed up the usb drivers for the mouse. Had to use system restore a bunch of times. Thanks anyway

  • Brian Sullivan
    Brian Sullivan Mar 18, 2011

    click start control panel administrive tools,computer management ,disk management right click on your drive select properties click tools you should see click check now click start two boxes automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now or you might tick one box then return after its finished the first repair the tick the second box

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