What is the startup program "Microsoft Windows Operating System - PowerShell.exe" on my Windows 7 computer?

"Microsoft Windows Operating System - PowerShell.exe" is installed as part of the Windows installation.

You will see the "PowerShell.EXE" listed on the Startup tab of msconfig.exe screen as:

Startup item: Microsoft Windows Operating System
Manufacture: Microsoft Corporation
Command: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
Location: C:\Users\...\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

Program file information about "powershell.EXE":

File name: powershell.exe
File path: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
File size: 473,600 bytes
Last modified time: ‎Monday, ‎July ‎13, ‎2009, ‏‎9:39:20 PM
File description: Windows PowerShell
File version: 6.1.7600.16385
Company name: Microsoft

"PowerShell.exe" is the PowerShell command window.

It is strongly recommended to delete "Microsoft Windows Operating System - PowerShell.exe" startup program from its "Startup" folder location at: C:\Users\...\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup. You can run PowerShell.exe manually, whenever you need it.

⇒ "Adobe Reader and Acrobat Manager - AdobeARM.exe" Startup Program

⇐ "Update Notifier - WZUPDA~1.EXE" Startup Program on Windows 7

⇑ Application Startup Programs on Windows 7

⇑⇑ Windows 7 Startup Programs