diff --git a/setup/setup.nsi b/setup/setup.nsi
index b3e38d1..d80100b 100644
--- a/setup/setup.nsi
+++ b/setup/setup.nsi
@@ -414,7 +414,9 @@ ${MementoSectionEnd}
 
 ${MementoSection} "Allow OS Upgrade" ALLOWOSUPGRADE
 	WriteRegDword HKLM "${REGPATH_WUPOLICY}" "AllowOSUpgrade" 1
+	WriteRegDword HKLM "${REGPATH_WUPOLICY}" "DisableOSUpgrade" 0
 	WriteRegDword HKLM "${REGPATH_WUPOLICY}\OSUpgrade" "AllowOSUpgrade" 1
+	WriteRegDword HKLM "${REGPATH_WUPOLICY}\OSUpgrade" "DisableOSUpgrade" 0
 	Call RebootIfRequired
 ${MementoSectionEnd}