Error: No Access Database Service is available in the farm.[User: SHAREPOINT\system].

Error:

No Access Database Service is available in the farm.[User: SHAREPOINT\system].
(or)
 No Access Data Services is available in the farm.

Reason:

You will get this error, when you are trying to create any site using "Access Database service"  like BDC or "Project Database" templates. The reason is "Access Database Service" may not be started. 

Solution:

Just follow my below steps:

1. Go to central admin 

2. Then go inside the "Application management"

3. Under the "Service Applications", select "Manage services on server"

4. In this page, "Access database service" may be stopped. 

5. Click to "Start" 

Thats it...