I am using Windows 7 Professional. When I am trying to start DefaultAppPool in IIS 7.0, I am getting error -

Service WAS was not found on computer '.'.

Is there any changes in setting need to be done?

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2 Answers 2


Well, start off by checking if it is installed.

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Control Panel > Programs > Programs and Features > Windows Process Activation Service

  • 13
    and then run iisreset /restart to make sure both services will run
    – itsho
    Jul 16, 2013 at 9:16
  • 2
    In case it helps anyone else, I already had these enabled but was still getting the error. I just disabled IIS features, restarted my pc, enabled them again, then restarted again and it solved my issue.
    – Jerreck
    Dec 19, 2015 at 4:54

Control Panel > Programs > Turn Windows features on or off > Windows Process Activation Service > SELECT ALL > Click OK

  • This was the missing part for me. Thanks @Bopanna!
    – aditya
    Oct 15, 2019 at 16:23

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