Software for Windows server monitoring [closed]
Oh, definitely take a look at EventSentry, it should be able to do most everything you want and at a reasonable price. There is a "lite" free version as well, of course it is more limited. And of course you know that monitoring file changes can generate extremely large volumes of audit data and take a lot of overhead...
You may want to look at zabbix www.zabbix.com.Open sourcedoes the utilization/resource thing, but also has customizable agents and the ability to do event notification.
I think the solution you're looking for comes straight from MS: System Center Operations Manager. It's pretty slick, but might be more (system and budget wise) than you need.