I installed an nginx server on Windows, then ran it and tested it by accessing it on the local host.
However I want to see more details which I can see on a Linux environment when running the htop
command (which gives details on the no. of worker processes running on the nginx server).
Does such command also exists on Windows?
You can try htop-alternative for windows - NTop https://github.com/Nuke928/NTop
Microsoft Sysinternals Suite can do what you need, as quite easily found via the search engine of your choice.
Specifically Process Explorer
Everything is built into Windows. Just go to task manager and click the different tabs. Especially the details tab to see processes etc.
You can also simply type "Get-Process" into PowerShell.
Here is more detail: https://technet.microsoft.com/en-us/library/ee176855.aspx