You need to run the command prompt as an Administrator to avoid the problem. For example:
- click on start
- click “All Programs”
- click on accessories
- right click on “Command Prompt” icon
- click “properties”
- click on the “shortcut” tab on the top
- click the advanced button at the bottom
- click on the check box that says “Run as Administrator”.
- click OK
When you now use the modified shortcut to the command prompt session it will allow you to perform Administrator operations and avoid the error.