Steps to reproduce:

1. HostnameItem=system.run["powershell.exe -NoProfile -ExecutionPolicy Bypass -NonInteractive [System.Net.Dns]::GetHostByName(($env:computerName)).Hostname.ToLower()"]
2. Restart zabbix agent2 as service

Result:

On version 6.2.7+:

Have a crash on start windows service on some Windows systems. I can't detect any depends from Windows version, but all problem hosts are server's platform.
In log file:
cannot process configuration: cannot get system hostname using "system.run["powershell.exe -NoProfile -ExecutionPolicy Bypass -NonInteractive [System.Net.Dns]::GetHostByName(($env:computerName)).Hostname.ToLower()"]" item specified by "HostnameItem" configuration parameter: Cannot execute command: exec: "cmd": cannot run executable found relative to current directory

Change service start mode from Automatic to Automatic (delay) have no effect.

Agnet2 started correctly when I try to start it as interactive program, not as service.

Agent2 version 6.2.6 and lowest started correctly as service too.

This type of setting I use for get full hostname as "host1.contoso.com" on Windows systems.