From df5d2d6e87238cd5d5784e3585611cf793cb1b8b Mon Sep 17 00:00:00 2001
From: Bill Zissimopoulos <billziss@navimatics.com>
Date: Wed, 4 May 2016 15:22:03 -0700
Subject: [PATCH] installer: disallow major upgrades

---
 build/VStudio/installer/Product.wxs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/build/VStudio/installer/Product.wxs b/build/VStudio/installer/Product.wxs
index f9c2b0aa..1bd4c723 100644
--- a/build/VStudio/installer/Product.wxs
+++ b/build/VStudio/installer/Product.wxs
@@ -14,6 +14,10 @@
             Compressed="yes"
             InstallScope="perMachine" />
         <MajorUpgrade
+            Disallow="yes"
+            AllowDowngrades="no"
+            AllowSameVersionUpgrades="no"
+            DisallowUpgradeErrorMessage="An older version of [ProductName] is already installed. You must uninstall it before you can install this version."
             DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
         <Media Id="1" Cabinet="WinFsp.cab" EmbedCab="yes" />