After reading this article,
I have some problems configuring point 2) and 3):
2) Create a SQL Server login that has the ability to backup (and restore) databases (y) by adding it to the SYSADMIN server role.
3) Add the domain account (x) to a security group on the SQL Server computer that has sufficient privileges to log on as a service, etc.
Where can I find detailed instructions/videos on how to accomplish them?