Solution
This error is caused by a conflict with the Communication Center. To resolve this issue, you will need to disable the Communication Center by editing the registry. Follow these steps:
On the Start menu (Windows), click Run.
In the Run dialog box, enter REGEDIT.
In the Registry Editor, locate the following subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\AutoCAD\R16.0\ACAD-204:409\CadManagerControl\CommunicationCenter \EnableCommunicationCenter
Double-click EnableCommunicationCenter.
In the Edit DWORD Value dialog box, change the Value data to 0 to disable the communication center.
If you do not want to disable the communication center, follow these steps:
Install the latest version of Microsoft Internet Explorer.
Change the security level settings in Microsoft Internet Explorer to default for all zones.
Install all Service Packs and updates for Microsoft Internet Explorer and the Windows Operating System. (You can find these updates at
http://www.windowsupdate.com)
Delete all temporary internet files for Microsoft Internet Explorer.
Clean out the Temp folder for the local user account.
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