diff --git a/mozilla/suite/installer/windows/nsis/shared.nsh b/mozilla/suite/installer/windows/nsis/shared.nsh
index c8f4f745cfd..3e82121bad0 100644
--- a/mozilla/suite/installer/windows/nsis/shared.nsh
+++ b/mozilla/suite/installer/windows/nsis/shared.nsh
@@ -193,8 +193,6 @@
   ${StrFilter} "${FileMainEXE}" "+" "" "" $R9
 
   StrCpy $0 "Software\Clients\StartMenuInternet\$R9"
-  ; Remove existing keys so we only have our settings
-  DeleteRegKey HKLM "$0"
   WriteRegStr HKLM "$0" "" "${BrandFullName}"
 
   WriteRegStr HKLM "$0\DefaultIcon" "" "$8,0"
@@ -260,9 +258,6 @@
   GetFullPathName $6 "$INSTDIR\mozMapi32.dll"
 
   StrCpy $0 "Software\Clients\Mail\${BrandFullNameInternal}"
-  ; Remove existing keys so we only have our settings
-  DeleteRegKey HKLM "$0"
-
   WriteRegStr HKLM "$0" "" "${BrandFullNameInternal}"
   WriteRegStr HKLM "$0\DefaultIcon" "" "$8,0"
   WriteRegStr HKLM "$0" "DLLPath" "$6"
@@ -332,9 +327,6 @@
   ; News
   ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   StrCpy $0 "Software\Clients\News\${BrandFullNameInternal}"
-  ; Remove existing keys so we only have our settings
-  DeleteRegKey HKLM "$0"
-
   WriteRegStr HKLM "$0" "" "${BrandFullNameInternal}"
   WriteRegStr HKLM "$0\DefaultIcon" "" "$8,0"
   WriteRegStr HKLM "$0" "DLLPath" "$6"