RobotStudio event

Problem starting the Virtual Controller

Hi all,
I just ran Robot Studio today and I got this error:
Exception: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) 09/01/2018 16:57:19 General 
I looked at this discussion "" and tried most of the solutions but none worked.
Has anyone solved this issue.

Thank You