EventSentry Light is a powerful tool that can monitor your Windows event logs (and system health), alerting you to any problems.
If you're a Windows expert and want to be warned if a particular event type occurs, for instance, then you can have the program display a message or send you an email.
A Software Monitoring option allows the program to log when software is installed, or uninstalled (useful if your PC has several users and you'd like to track what they're doing). And it can also record programs that have configured themselves to load when Windows launches.
A Disk Space monitor is able to alert you when the free space on a drive gets too low (you get to decide what figure that might be). Or it can check a particular folder, alerting you when its size exceeds or falls below a particular limit.
And the Performance Monitoring module can track your PCs CPU or memory usage, again logging the details if something's hogging all your resources.
If you need even more power then opting for the commercial edition will get you the ability to manage more than 2 remote computers, with web-based reporting and iPhone/ Android apps. Command line tools support automation, there are full software and hardware inventories, and if you have any problems then you can call on phone, email and even "getting started" support. Prices start at $85 per host, and the EventSentry site will tell you more.
Version 22.214.171.124 (changelog).
NetFlow with support for NetFlow v1, v5, v9 & sFlow. NetFlow supports visualization, geolocation, alerts, correlation with workstation logon events to map flows to ActiveDirectory users, filtering and more
Web Reports - Notes & Documentation: Web reports users can submit notes to document infrastructure updates, maintenance, fixes and more. Documentation files can be uploaded and associated with hosts
Web Reports: New security features
Web Reports: New dashboard tiles
Web Reports: Treemap visualization available for most pages
Web Reports: Updated look and improved menu
Deployment: Agents using the collector can receive configuration and agent binary updates automatically through the collector without user intervention.
Deployment: MSI installers can now be created in a few seconds directly from the management console (requires free WiX Toolset)
Agent: A 64-bit agent is now available for 64-bit Windows
Agent: Removed limit and improved management of custom event logs
Agent: Support for chaining events
Agent / Collector: Emails containing IP addresses sent through collector can be enhanced to display geolocation and reverse lookup data inline.
Agent: Emails from security event log will automatically be enhanced with descriptions for many status and error codes
Agent: Database performance of delimited log files has been significantly improved
Agent: Insertion strings of events can be created or replaced using regular expressions
Agent: Install date of software is now available for most software even if it was installed before EventSentry
Heartbeat Agent: Agent status is now retrieved directly from collector and/or database for faster and more efficient monitoring
Network Services: Database performance for Syslog component has been improved for MSSQL databases
Network Services: License count for network devices is now more accurately enforced
Database: Built-In database now uses PostgreSQL v9.6, optional upgrade path is available
Configuration: Improved out-of-the-box filter rules for less noise
Management Console: Remote configuration can now removed when uninstalling an agent even when remote registry service is unavailable