You can add the "Logon as a service" right to an account on the server by following these steps:
Step 1 - Open Local Security Policy.
Step 2 - In the console tree, double-click Local Policies, and then click User Rights Assignments.
Step 3 - In the details pane, double-click Log on as a service.
Step 4 - Click Add User or Group, and then add the appropriate account to the list of accounts that possess the Log on as a service right.