IIS 7 Error Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

- Modify Application Pool Settings in IIS
  Go to IIS, Select ServerName, click Application Pools, select Application Pool, click "Set Application Pool Defaults", change load user profile to True