Hi
Which Adobe product and what operating system are you using?\
I would recommend following the troubleshooting steps provided in these documents :
MAC : http://helpx.adobe.com/x-productkb/global/error-licensing-stopped-mac- os.html
Win : http://helpx.adobe.com/creative-suite/kb/error-licensing-stopped-windo ws.html
Thanks
North America
Europe, Middle East and Africa
Asia Pacific