The Vista security feature that's most effective -- and the most annoying -- will sometimes prevent the Run and command line tools from doing what you tell them to do. This is (usually) due to the fact that you haven't told it you're an Administrator. [Note: this technique can be applied to other programs as well.]
I overcome this annoyance by creating a desktop shortcut and setting its Properties to "Run as an Administrator".
To create an Admin-level command prompt, go to Start >Programs and open the Accessories folder. Right-click on, and holding down the right-click, use the cursor to drag the black Command Prompt icon to a vacant area on your descktop. Let go and select (click) "Create shortcut here" from the list of choices.
Now you will have a new, black Command Prompt icon. Right-click on your new icon, and select Properties and click on the Shortcut tab. Now click on the "Advanced" button toward the bottom
Place a check in the "Run as Administrator" checkbox, and click the "OK" button twice. That's it!
Now you will be able to accomplish the advanced commands as you expect you should.
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