> Could be possible that you have accidentally placed an Autorun.inf file on
> the root of both drives. You need check for that file and delete them.
>
> 1. Open My Computer - click Tools - Folder Options
> 2. Enable "Show hidden files and folders".
> 3. Right-click on C Drive and choose Open.
> 4. Look for that file on the root and delete it. Do the same for another
> drive.
> 5. Restart or Log Off and Log In again for changes to take effect.
>
> Hope this help, let us know!

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Thanks for your help but it seems never take any effect!
I can't find any Autorun.inf file in Drive C even D.
What can i do next?
Is there some thing goes wrong with my computer's registry?