Service 'zenDBSrv.exe' on server 'localhost' is not running in 7.20

Service 'zenDBSrv.exe' on server 'localhost' is not running in 7.20

Hello,

I am using 7.20 version for some legacy project.

After installing the setup, Default Demo Project is not loading. I tried creating a new project, It says " 
Service 'zenAdminSrv.exe' on server 'localhost' is not running!"

Kindly support to resolve this.

Thanks,
Raja