A simple and free Windows monitoring program?

Question

Monitoring

There are several servers on Windows, you need to be able to monitor them. I'm interested in simple indicators - CPU load, free / used ROM and RAM space, you need to see the current values ​​\u200b\u200band the history of changes (graph).

What else is needed:
1. Notification at extreme values, when the machine disappears from the network
2. IIS for the web muzzle.
3. Monitoring sites by pings (optional)

It is also desirable that it be monolithic and not a zoo of tools that need to be installed (like cacti).

Almost all the solutions that I have seen are either overcomplicated or paid.

Answer 1

zabbix?