Error code 11 is 0xB in hex. If you open TurboActivate.h, and scroll down to the errors, you'll see 0x0B is:
/* MessageId: TA_E_COM
MessageText:
The hardware id couldn't be generated due to an error in the COM setup. Re-enable Windows Management Instrumentation (WMI) in your group policy editor or reset the local group policy to the default values. Contact your system admin for more information.
This error is Windows only.
This error can also be caused by the user (or another program) disabling the "Windows Management Instrumentation" service. Make sure the "Startup type" is set to Automatic and then start the service.
To further debug WMI problems open the "Computer Management" (compmgmt.msc), expand the "Services and Applications", right click "WMI Control" click "Properties" and view the status of the WMI.*/#define TA_E_COM ((HRESULT)0x0000000BL)
Which tells you what is wrong and how to fix it. Also, update to the latest version of TurboActivate (current 3.4.4). You can get it on your API page.