SOLUTION :
Press the Windows + R keys on your keyboard, type ''services.msc'' and click OK. Once in the services applet, search for the entries related to the database version you have installed and make ensure these services are running and set to automatic start.
If you are using the Firebird database you will need to search in the services applet for Firebird guardian and Firebird Server. Make sure that both are running and set to automatic start.
If you are using the MYSQL database you will need to search in the services applet for entries related to MYSQL. Again, ensure these services are running and set to automatic start.