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How Do I Correct the 'Another Installer is Already Running' Error Message?

Primary Software: LabVIEW Development Systems>>LabVIEW Full Development System
Primary Software Version: 6.1
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem:
I am trying to uninstall LabVIEW, or any other National Instruments product that uses the Microsoft Installer, but every time I run the uninstaller, I get an error message telling me that Another installer is already running. I am not installing any other applications. How do I get rid of this message so that I can run my uninstaller?

Solution:
It is possible that a previous installation on your computer has become corrupted. If this happens, it will not complete execution properly, and may continue to run in the background, even after a restart. The Microsoft Windows Installer does not allow multiple products to install simultaneously, so if one product appears to be installing, you will not be able to install others.

One way to break out of the loop is to reinstall the Microsoft Installer. Reinstalling the installer should cause any current installations to terminate. Follow the links below for the version of your operating system and download the Windows Installer. Running the installer may generate an error, but it usually kills the corrupted process. After running the installer, reboot the machine and attempt your installation. If you still receive installer errors, you may want to run the Windows Installer Cleanup Utility, which can be found on Microsoft's support pages, linked below.

Related Links:
Windows Installer Redistributable for Windows 7 and later
Windows Installer Redistributable for Windows 2000 and XP 
Windows Installer Redistributable for Windows 95, 98, and Me
Windows Installer Redistributable for Windows 2000 and Windows NT 4.0
Description of the Windows Installer Cleanup Utility


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Report Date: 11/20/2002
Last Updated: 08/12/2013
Document ID: 2RJ945FP

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