From bdf87f80efb152933f42726fc630238bb0746035 Mon Sep 17 00:00:00 2001
From: Musa Asad <musaasad@amazon.com>
Date: Thu, 23 Apr 2026 15:38:06 +0000
Subject: [PATCH] =?UTF-8?q?Fix=20msiexec=20hang=20on=20Windows=20=E2=80=94?=
 =?UTF-8?q?=20add=20/qn=20/norestart=20to=20install.ps1?=
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Without /qn, msiexec shows a UI dialog on error (e.g. MSI mutex
conflict 1618). In Session 0 (SSM/non-interactive), this dialog is
invisible and blocks indefinitely. Adding /qn ensures silent mode
so errors return immediately. /norestart prevents unexpected reboots.
---
 packaging/windows/install.ps1 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packaging/windows/install.ps1 b/packaging/windows/install.ps1
index 61cefc74b..256d8d811 100644
--- a/packaging/windows/install.ps1
+++ b/packaging/windows/install.ps1
@@ -14,7 +14,10 @@
 Set-StrictMode -Version 2.0
 $ErrorActionPreference = "Stop"
 
-Start-Process msiexec.exe -Wait -ArgumentList '/i amazon-cloudwatch-agent.msi'
+$proc = Start-Process msiexec.exe -Wait -PassThru -ArgumentList '/i amazon-cloudwatch-agent.msi /qn /norestart'
+if ($proc.ExitCode -ne 0 -and $proc.ExitCode -ne 3010) {
+    throw "msiexec failed with exit code $($proc.ExitCode)"
+}
 
 $CWADirectory = 'Amazon\AmazonCloudWatchAgent'
 $CWAProgramFiles = "${Env:ProgramFiles}\${CWADirectory}"