This message may be caused by browser settings or proxy server / firewall settings. If disabling the following browser settings fails to resolve, please follow the instructions outlined in BB577684 to resolve this issue.

 Disable browser proxy settings in Internet Explorer and also in Firefox if present: 

      For Internet Explorer or Google Chrome:
  1. Navigate to Start > Control Panel > Internet Options
  2. Select the Connections tab
  3. Click LAN settings
  4. Under Proxy server ensure that Use a proxy server for your LAN checkbox is not marked
  5. Click OK

     In Firefox:
  1. From the Firefox bar, navigate to Options > Options, then select the Network tab. Click the Settings button. Under Configure Proxies to Access the Internet, select the No proxy radio button. Click OK and re launch your browser. If this fails to resolve, move on to step #2. 
  2. Disable DNS Prefetching: In the Location bar, type about:config and press Enter
  3. The about;config "This might void your warranty!" warning page may appear. Click I'll be careful, I promise! to continue to the about:config page.
  4. Right-click in the list of preferences, select New, and then select Boolean.
  5. In the Enter the preference name window, enter network.dns.disablePrefetch and click OK
  6. Select true when prompted to set the value and click OK.   
  7. Re-launch Firefox

If the above Knowledgebase solution does not resolve the issue, check the workstation to see if a program called Browser Safeguard is installed.  If so, uninstall it from the workstation and try again.  Some more documentation on Browser Safeguard can be found here:  http://malwaretips.com/blogs/browsersafeguard-virus-removal/

Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites, and we cannot assist with implementing resolutions from these websites.