Update lob-apps-windows.md

Added clarity to the important note as to why it fails.

Author: msbemba

memdocs/intune/apps/lob-apps-windows.md

@@ -39,7 +39,7 @@ ms.collection:
 A line-of-business (LOB) app is one that you add from an app installation file. This kind of app is typically written in-house. The following steps provide guidance to help you add a Windows LOB app to Microsoft Intune.
 
 > [!IMPORTANT]
-> When deploying Win32 apps using an installation file with the .msi extension (packaged in an .intunewin file using the Content Prep Tool), consider using [Intune Management Extension](../apps/intune-management-extension.md). If you mix the installation of Win32 apps and line-of-business apps during AutoPilot enrollment, the app installation may fail.  
+> When deploying Win32 apps using an installation file with the .msi extension (packaged in an .intunewin file using the Content Prep Tool), consider using [Intune Management Extension](../apps/intune-management-extension.md). If you mix the installation of Win32 apps and line-of-business apps during AutoPilot enrollment, the app installation may fail as they both use the Trusted Installer service at the same time.
 
 ## Select the app type
 
@@ -124,4 +124,4 @@ This capability is useful to avoid getting into a race condition. For instance,
 
 - Learn more about the context of your app in Intune. See [Overview of the app lifecycle in Microsoft Intune](app-lifecycle.md).
 
-- Learn more about Win32 apps. See [Win32 app management](apps-win32-app-management.md).
+- Learn more about Win32 apps. See [Win32 app management](apps-win32-app-management.md).