This error is caused by Protection mode being enabled in your internet security settings of the Windows Vista /Internet Explorer 7 browser.
You will need to disable Protection Mode. Below are the steps:
Step 1: Double click the Internet icon at the bottom of your Internet Explorer 7 browser to bring up the Internet Security options .
or click Tools at the top of your browser and select Internet Options.
From the Internet Options box, click the Security tab.
Step 2: Clear the Enable Protection Mode check box and click Apply then OK.
Note: Internet Explorer must be closed and re-opened for changes to take effect you should have and Internet icon at the bottom of your browser that now shows Protection Mode: Off.