diff --git a/packaging/windows/snclient.wxs b/packaging/windows/snclient.wxs
index 3e91cf67..bca1a164 100644
--- a/packaging/windows/snclient.wxs
+++ b/packaging/windows/snclient.wxs
@@ -15,7 +15,7 @@
 <Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
     <Product Name="SNClient" Id="*" UpgradeCode="F4BF03F6-D3DA-44FF-A444-9B64119DA0CE" Language="1033" Codepage="1252" Version="$(var.MajorVersion).$(var.MinorVersion).$(var.RevisionNumber)" Manufacturer="ConSol Consulting and Solutions Software GmbH">
         <Package InstallScope="perMachine" InstallerVersion="$(var.InstallerVersion)" Compressed="yes" />
-        <MajorUpgrade AllowSameVersionUpgrades="yes" DowngradeErrorMessage="A newer version of [ProductName] is already installed. It must be uninstalled for downgrades." />
+        <MajorUpgrade AllowSameVersionUpgrades="yes" Schedule="afterInstallInitialize" DowngradeErrorMessage="A newer version of [ProductName] is already installed. It must be uninstalled for downgrades." />
         <Property Id="REBOOT" Value="ReallySuppress" />
         <Property Id="MSIRESTARTMANAGERCONTROL" Value="Disable" />
         <Property Id="WIXUI_INSTALLDIR" Value="INSTALLDIR" />
@@ -99,7 +99,7 @@
         <SetProperty Id="CustomUnInstallerAction" Sequence="execute" Before="CustomUnInstallerAction" Value="&quot;[INSTALLDIR]snclient.exe&quot; uninstall pkg &quot;INSTALLDIR=[INSTALLDIR]; WIX_UPGRADE_DETECTED=[WIX_UPGRADE_DETECTED]; REMOVE=[REMOVE]; UPGRADINGPRODUCTCODE=[UPGRADINGPRODUCTCODE]&quot;" />
         <CustomAction Id="CustomUnInstallerAction" BinaryKey="WixCA" DllEntry="WixQuietExec" Execute="deferred" Return="ignore" Impersonate="no" />
         <InstallExecuteSequence>
-            <Custom Action="CustomPreUpdateAction" After="InstallInitialize"></Custom>
+            <Custom Action="CustomPreUpdateAction" Before="RemoveExistingProducts"></Custom>
             <Custom Action="CustomUnInstallerAction" Before="RemoveFiles"><![CDATA[REMOVE ~= "ALL" AND (NOT UPGRADINGPRODUCTCODE)]]></Custom>
             <Custom Action="CustomInstallerAction" Before="InstallFinalize"></Custom>
         </InstallExecuteSequence>