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The Windows Installer Service could not be accessed (Endpoint Security installation fails)
Technical Articles ID:   KB86580
Last Modified:  9/14/2018
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Environment

McAfee Endpoint Security (ENS) 10.x

Microsoft Windows

Problem

Endpoint Security installation fails with the following pop-up error from Microsoft MSIExec:
 
The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed. Contact your support personnel for assistance.

Cause

The Windows installer service is missing or corrupted.

Solution

When the Windows installer service is missing or corrupted, see the following Microsoft article to resolve the issue: https://support.microsoft.com/en-us/kb/324516

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