Check if windows service is running, Zabbix 2

Windows OS Template must be added under host

Open host

Go to Items under Windows OS Template:

Create new item:

Write service_state[service name].
In this example wuauserv stands for "Windows Update" service
Leave other fields to their default state. Click save:

Go to trigers:

Click create trigger:

Write {blahblah:service_state[wuauserv].last(0)}#0.
#0 means not running. blahblah stands for real hostname of computer:

Now you can test it.

Turn off windows update service at client computer.
Wait a minute and you can see at the dashboard the bessage apears:

Source:
https://www.zabbix.com/forum/zabbix-help/5339-monitoring-windows-services?t=5194