Why is Site24x7 Windows agent blocking updates to my AntiVirus product?
When you are monitoring services using Site24x7 Windows Server Monitoring, the monitoring agent will register the service for an instant notification for that service status change, which may get locked during the update and sometimes this can cause service lock.
We can stop instant notification for service monitoring, but you will be get alerts during the next data collection. As an alternative, change the "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\ManageEngine\Site24x7WindowsAgent\EnableServiceInstantNotification" registry value to "NO" and restart the agent.