This error can occur if you have a "bad download". When Setup is run, it checks the integrity of the Setup file itself. This error is generated if it is determined that the Setup file has missing or corrupted data. To fix the problem, you simply need to try downloading again.
Following the steps below should increase your chances of being successful on your next download attempt:
- Delete the Setup file that contains the error.
- Empty your Temporary Internet Files folder. See the help that is included with your browser to see how to do this.
- Try downloading the file again.
- Try to refrain from downloading too many other things at the same time.