From: Bishara AbuHattoum <bishara@daynix.com>

Issue: When upgrading qemu-ga using the msi from an old version
       to a newer one, the upgrade is not allowed by the msi
       showing this error message "Another version of this product
       is already installed."

BZ# 1536331: https://bugzilla.redhat.com/show_bug.cgi?id=1536331

Fix: For the upgrade to be allowed by the msi the WiX file must
     provide three things:
      1. Changing product's Id. (assigning it to "*")
      2. Constant product's UpgradeId. (exists)
      3. Changing version. (exists)

Reference: http://wixtoolset.org/documentation/manual/v3/howtos/updates/major_upgrade.html

Signed-off-by: Bishara AbuHattoum <bishara@daynix.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 qga/installer/qemu-ga.wxs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qga/installer/qemu-ga.wxs b/qga/installer/qemu-ga.wxs
index 5af11627f8..f751a7e9f7 100644
--- a/qga/installer/qemu-ga.wxs
+++ b/qga/installer/qemu-ga.wxs
@@ -41,7 +41,7 @@
 
   <Product
     Name="QEMU guest agent"
-    Id="{DF9974AD-E41A-4304-81AD-69AA8F299766}"
+    Id="*"
     UpgradeCode="{EB6B8302-C06E-4BEC-ADAC-932C68A3A98D}"
     Manufacturer="$(env.QEMU_GA_MANUFACTURER)"
     Version="$(env.QEMU_GA_VERSION)"
-- 
2.11.0