The monitoring tools available on Windows have a slightly different balance of strengths and weaknesses compared to the traditional Unix ones. You can't easily run them directly from the command line, and there are some additional steps required before any data can be saved. On the upside, the graphing capabilities are fully integrated.
Windows monitoring tools
Task Manager
The simplest way to monitor what's happening live on a Windows server is to use the Task Manager, available by right-clicking on the Start bar or by hitting Ctrl + Shift + Esc. This provides a similar view to the Unix top utility.