Use Windows PowerShell to count the number of unique processes

Here’s another tip from my colleague Ed Wilson (the Microsoft Scripting Guy) about how to use PowerShell to

Question: You want to know how many processes on a system are unique. How can you easily find this information?

Answer: Use the Get-Process cmdlet to get the list of processes. Pipeline the resulting objects to the Sort-Object cmdlet and then to the Get-Unique cmdlet. Pipeline the entire results to the Measure-Object cmdlet. This technique appears here:

get-process | Sort-Object name | Get-Unique | measure 

Mitch Tulloch is a nine-time recipient of the Microsoft Most Valuable Professional (MVP) award and a widely recognized expert on Windows administration, deployment and virtualization.  For more information see

Ed Wilson is the bestselling author of eight books about Windows Scripting, including Windows PowerShell 3.0 Step by Step, and Windows PowerShell 3.0 First Steps. He writes a daily blog about Windows PowerShell call Hey, Scripting Guy! that is hosted on the Microsoft TechNet Script Center; for more PowerTips check out the Hey, Scripting Guy! blog.

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