How to resolve the error "“Error occurred in deployment step 'Retract Solution': Cannot start service SPUserCodeV4 on computer <server name>".

In this we will be seeing how to resolve the error "Error occurred in deployment step 'Retract Solution': Cannot start service SPUserCodeV4 on computer <server name>".

Normally when you create a Sandbox solution in Visual studio 2010 and if you deploy the solution into the SharePoint 2010 sometimes you may be getting an error “Error occurred in deployment step 'Retract Solution': Cannot start service SPUserCodeV4 on computer <server name>”.

Reason for getting an error:

The reason for getting the error Microsoft SharePoint Foundation Sandboxed Service is not started by default; you must start it before you deploy a sandboxed solution.

How to resolve the error:

• Go to the Central Administration.
• In Service Applications, Click on Manage services on server.
  
  
  
• You could find Microsoft SharePoint Foundation Sandboxed Service.
  
  
  
• Start the service.

Remember that before deploying a Sandbox solution Microsoft SharePoint Foundation Sandboxed Service should be started.