CAD tip # 7739:

If your activation fails on a 64-bit Windows OS, use the hotfix Download

The following tips apply also for version 2011, 2012, 2013, 2014, 2015 and higher:

Check also your antivirus tools and your Windows security settings. Check also the ActiveX scripting control in your Internet Explorer security settings.

It could be caused also by a Windows scripting problem. Use RegEdit to set the Registry values:

  
HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0  

  
HKLM\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0  

Try to edit the RTBeginReg.html file in the C:\Program Files\Common Files\Autodesk Shared\AdLM\R{1-7}\en-US\Webdepot folder - add the following line of below the html line:

<!-- saved from url=(0016)http://localhost -->

If this won't help, re-register the DLL files of the scripting engine. In a DOS window (as an Administrator), perform:

  
CD C:\Windows\System32 (in a 64-bit OS: CD C:\Windows\SysWow64)  
regsvr32 vbscript.dll  
regsvr32 jscript.dll  

If you use Internet Explorer 10 (Win8), try to disable and enable MSIE10 in your system - in Windows Control Panels go to Programs and Features > Turn Windows features on or off. Uncheck the item "Internet Explorer 10", end the dialog with OK and restart Windows. Similarly re-enable the MSIE10 feature and again restart Windows. Re-run your CAD application.