To select an account under which a service will run
Right-click the service to which you want to assign a user or group account, and then click Properties.
Click the Log On tab, and then do one of the following:
To specify that the service use the LocalSystem account, click Local System account.
To specify that the service use the LocalService account, click This account, and then type NT AUTHORITY\LocalService.
To specify that the service use the NetworkService account, click This account, and then type NT AUTHORITY\NetworkService.
To specify another account, click This account, click Browse, and then specify a user account in the Select User dialog box. When you are finished, click OK.
Type the password for the user account in the Password box and in the Confirm password box, and then click OK.
Changing the default service settings might prevent key services from running correctly. It is especially important to use caution when changing the Startup Type and Log On As settings of services that are configured to start automatically.
To open Services, click Start, click Control Panel, click Performance and Maintenance, click Administrative Tools, and then double-click Services.
The user account must be configured specifically for logging on to the service. To confirm that the user account is configured correctly, right-click the user account in Local Users and Groups. In the Properties dialog box, on the General tab, confirm that the Password never expires check box is selected, and then click the Member of tab to confirm that the user is a member of the appropriate groups. For more information about Local Users and Groups, see Related Topics.
If you select an account that does not have permission to log on as a service, Services automatically grants the appropriate permissions to that account on the computer that you are managing.