Windows Vista vista ultimate sp1 can't intal USB drivers

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Software environment:

vista ultimate(sp1 instaled).
visual studio 2008
microsoft office2007
vista master 3.0
bitdefender antivirus 2008
zonealarm pro7.1

USB hardware can be Detected and instaled at the beginning.
I don't know what I've done caused this.

I did some disk cleanning.


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windows encountered a problem installing the driver software for your device

windows found driver software for your device but encountered an error
while attempting to instal it.

USB Mass Storage Device
The system cant find the file specified
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.

Can't instal update of KB940199.


I recovered "C:\Windows\System32\DriverStore\FileRepository ".

error remainning.

 

Is it only the Mass Storage Device that has the problem? Is it a memory stick or an external HDD drive?

You may have "cleaned" something important. Some memory sticks have a program that runs when you connect it, the one I know is called U3 and manages files on the drive. Does it appear as a drive in Start -> Computer? You can right-click on the drive and select Explore. Can you see any files or folders on the drive?

Matt