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TN WW220 Windows Installer setup is already running.




This article from InSource shows how to install an application when windows installer is already running.

WIndows Installer Error.png

  • Author: Christopher Cleope    
  • Published: 2/21/19
  • Applies to: All applications


  1. Open the registry. Go to the windows run button and type in Regedit.
  2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\msiserver and locate the Start registry key and double click it.

Registry edit windows installer.png

  1. In the value data box type in 4. (Remember to backup your registry before changing values)

Popup box registry windows installer.png

  1. Reboot system and try to install your application again.


Different startup types

-Automatic :2

-Manual: 3

-Disable: 4

-Automatic (delayed start): 2