Open Source The Dude Alternatives for Windows
The Dude is not available for Windows but there are plenty of alternatives that runs on Windows with similar functionality. The most popular Windows alternative is 
Datadog. It's not free, so if you're looking for a free alternative, you could try 
Spiceworks Help Desk or 
PRTG Network Monitor. If that doesn't suit you, our users have ranked 28 alternatives to The Dude and 16 are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to The Dude are 
Cacti (Free, Open Source), 
Pandora FMS (Free, Open Source), 
Lansweeper Network Inventory (Freemium) and 
CloudRadar Monitoring (Paid).
- Cacti is a complete frontend to RRDTool, it stores all of the necessary information to create graphs and populate them with data in a MySQL database.
- Enterprise-ready monitoring solution that provides unparalleled flexibility for IT to address both immediate and unforeseen operational issues, including infrastructure and IT processes.
- OpenNMS is an enterprise grade network monitoring and network management platform developed under the free software or open source model.
- NetXMS is an enterprise grade multi-platform open source network management and monitoring system.