diff --git a/setup/installer/linux/freeze.py b/setup/installer/linux/freeze.py
index 067862e4ba..ef9c9d9a8e 100644
--- a/setup/installer/linux/freeze.py
+++ b/setup/installer/linux/freeze.py
@@ -20,7 +20,6 @@ class LinuxFreeze(Command):
         from cx_Freeze import Executable, setup
         from calibre.linux import entry_points
         from calibre import walk
-        from calibre.web.feeds.recipes import recipe_modules
 
         is64bit = platform.architecture()[0] == '64bit'
         arch = 'x86_64' if is64bit else 'i686'
@@ -110,7 +109,6 @@ class LinuxFreeze(Command):
         packages = ['calibre', 'encodings', 'cherrypy', 'cssutils', 'xdg',
                     'dateutil', 'dns', 'email']
 
-        includes += ['calibre.web.feeds.recipes.'+r for r in recipe_modules]
         includes += ['calibre.gui2.convert.'+x.split('/')[-1].rpartition('.')[0] for x in \
                 glob.glob('src/calibre/gui2/convert/*.py')]
 
diff --git a/setup/installer/windows/freeze.py b/setup/installer/windows/freeze.py
index 4960337c1c..55e49d1f9b 100644
--- a/setup/installer/windows/freeze.py
+++ b/setup/installer/windows/freeze.py
@@ -141,7 +141,9 @@ class Win32Freeze(Command, WixMixIn):
             shutil.copytree(x, self.j(sp_dir, self.b(x)))
 
         for x in (r'calibre\manual', r'calibre\trac', 'pythonwin'):
-            shutil.rmtree(self.j(sp_dir, x))
+            deld = self.j(sp_dir, x)
+            if os.path.exists(deld):
+                shutil.rmtree(deld)
 
         for x in os.walk(self.j(sp_dir, 'calibre')):
             for f in x[-1]:
diff --git a/setup/installer/windows/wix-template.xml b/setup/installer/windows/wix-template.xml
index 8ef2de1f83..0c07ccc07a 100644
--- a/setup/installer/windows/wix-template.xml
+++ b/setup/installer/windows/wix-template.xml
@@ -2,14 +2,29 @@
 <Wix xmlns='http://schemas.microsoft.com/wix/2006/wi' xmlns:util="http://schemas.microsoft.com/wix/UtilExtension"
 >		
 
-		<Product Name='{app}' Id='{product_guid}' UpgradeCode='{upgrade_code}'
+		<Product Name='{app}' Id='*' UpgradeCode='{upgrade_code}'
 				Language='1033' Codepage='1252' Version='{version}' Manufacturer='Kovid Goyal'>
 				
 				<Package Id='*' Keywords='Installer' Description="{app} Installer"
 						Comments='{app} is a registered trademark of Kovid Goyal' Manufacturer='Kovid Goyal'
 						InstallerVersion='300' Languages='1033' Compressed='yes'
 						SummaryCodepage='1252' />
+
                 <Media Id="1" Cabinet="{app}.cab" CompressionLevel="{compression}" EmbedCab="yes" />
+                
+                <Upgrade Id="{upgrade_code}">
+                    <UpgradeVersion Maximum="{version}"
+                       IncludeMaximum="yes"
+                       OnlyDetect="no"
+                       Language="1033"
+                       Property="OLDPRODUCTFOUND"/>
+                    <UpgradeVersion Minimum="{version}"
+                       IncludeMinimum="no"
+                       OnlyDetect="yes"
+                       Language="1033"
+                       Property="NEWPRODUCTFOUND"/>
+               </Upgrade>
+               <CustomAction Id="PreventDowngrading" Error="Newer version already installed."/>
 
                 <Directory Id='TARGETDIR' Name='SourceDir'>
                     <Merge Id="VCRedist" SourceFile="{crt_msm}" DiskId="1" Language="0"/>
@@ -102,7 +117,14 @@
                 <Condition
                     Message="This application is only supported on Windows XP SP2, or higher.">
                     <![CDATA[Installed OR (VersionNT >= 501)]]>
-				</Condition>
+                </Condition>
+                <InstallExecuteSequence>
+                    <Custom Action="PreventDowngrading" After="FindRelatedProducts">NEWPRODUCTFOUND</Custom>
+                    <RemoveExistingProducts Before="InstallInitialize" />
+                </InstallExecuteSequence>
+                <InstallUISequence>
+                    <Custom Action="PreventDowngrading" After="FindRelatedProducts">NEWPRODUCTFOUND</Custom>
+                </InstallUISequence>
 
                 <UI>
                     <UIRef Id="WixUI_Advanced" />
diff --git a/setup/installer/windows/wix.py b/setup/installer/windows/wix.py
index fe560f43a3..857a667a9e 100644
--- a/setup/installer/windows/wix.py
+++ b/setup/installer/windows/wix.py
@@ -6,12 +6,10 @@ __license__   = 'GPL v3'
 __copyright__ = '2009, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-import os, uuid, shutil, subprocess
+import os, shutil, subprocess
 
 from setup import __appname__, __version__, basenames
 
-guid = uuid.uuid4 # Random GUID
-
 WIXP = r'C:\Program Files\Windows Installer XML v3.5'
 CANDLE = WIXP+r'\bin\candle.exe'
 LIGHT = WIXP+r'\bin\light.exe'
@@ -31,8 +29,7 @@ class WixMixIn:
         wxs = template.format(
                 app               = __appname__,
                 version           = __version__,
-                product_guid      = guid(),
-                upgrade_code      = guid(),
+                upgrade_code      = 'BEB2A80D-E902-4DAD-ADF9-8BD2DA42CFE1',
                 compression       = self.opts.msi_compression,
                 app_components    = components,
                 exe_map           = self.smap,