Stop managing the service manually, let the MSI installer handle it

packages/zabbix_agent.xml

@@ -2,7 +2,7 @@
 <packages>
     <package id="zabbix_agent"
              name="Agent de supervision Zabbix"
-             revision="19"
+             revision="20"
              priority="10"> 
 
         <variable name="PKG_VERSION" value="3.0.1" />
@@ -14,34 +14,10 @@
         <install cmd='msiexec /qn /i "%MSI%" SERVER=%ZBX_SERVER_IP% RMTCMD=0' />
         <install cmd='netsh advfirewall firewall add rule name="Zabbix Agent" dir=in action=allow protocol=TCP localport=10050 enable=yes remoteip=%ZBX_SERVER_IP%' />
 
-        <upgrade cmd='"%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.exe" -c "%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.conf" --stop'>
-            <exit code="1" />
-            <exit code="0" />
-        </upgrade>
-        <upgrade cmd='"%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.exe" -c "%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.conf" --uninstall'>
-            <exit code="1" />
-            <exit code="0" />
-        </upgrade>
         <upgrade include="install" />
 
-        <downgrade cmd='"%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.exe" -c "%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.conf" --stop'>
-            <exit code="1" />
-            <exit code="0" />
-        </downgrade>
-        <downgrade cmd='"%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.exe" -c "%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.conf" --uninstall'>
-            <exit code="1" />
-            <exit code="0" />
-        </downgrade>
         <downgrade include="install" />
 
-        <remove cmd='"%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.exe" -c "%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.conf" --stop'>
-            <exit code="1" />
-            <exit code="0" />
-        </remove>
-        <remove cmd='"%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.exe" -c "%PROGRAMFILES%\Zabbix Agent\zabbix_agentd.conf" --uninstall'>
-            <exit code="1" />
-            <exit code="0" />
-        </remove>
         <remove cmd='%COMSPEC% /C msiexec /qn /norestart /x "%MSI%"' />
         <remove cmd='netsh advfirewall firewall del rule name="Zabbix Agent"' />