Specific rights must be granted to user accounts to allow the account to be used to run as a service. There are a number of possible methods.
Method 1: Grant rights using Group Policy
This can be achieved using group policy: http://support.microsoft.com/kb/256345/
Method 2: Grant rights using Security templates
Similar to method 1 but using Security templates to change the permissions on system services.
1. Click Start, click Run, and then type MMC.
2. On the Console menu, click Add/Remove Snap-in.
3. Click Add.
4. Select the Security Configuration and Analysis snap-in, and then click Add.
5. Click Close, and then click OK.
6. In the MMC, right-click the Security Configuration and Analysis item, and then click Open Database.
7. Give a name for the database, and then browse to where you would like to store it.
8. When prompted, select a Security Template to import. For example, the "basicwk.inf" contains values for the standard settings found on a Windows 2000 Professional computer.
9. In the MMC, right-click the Security Configuration and Analysis item, and then click the Analyze Computer now option. Choose a location for the log file, when prompted.
10. After analysis is complete, configure the service permissions as follows:
1. Double-click the System Services branch in the MMC.
2. Right-click the service that you want to change, and then click Security.
3. Click Edit Security.
4. Add user accounts as required, and configure the permissions for each account. By default, the user will be granted "Start, stop and pause" permissions.
11. To apply the new settings to the local computer, simply right-click the Security Configuration and Analysis item, and then click the Configure Computer Now option.
Method 3: Grant rights using Subinacl.exe
The final method for assigning rights to manage services is to use the Subinacl.exe utility from the Windows 2000 Resource Kit. The syntax for this is:
SUBINACL /SERVICE \\MachineName\ServiceName /GRANT=[DomainName\]UserName[=Access]
Full details from Microsoft: