13 files changed, 108 insertions, 98 deletions
diff --git a/indra/newview/installers/windows/installer_template.nsi b/indra/newview/installers/windows/installer_template.nsi
index 14c8dba39f..bd290b710b 100644
--- a/indra/newview/installers/windows/installer_template.nsi
+++ b/indra/newview/installers/windows/installer_template.nsi
@@ -32,7 +32,7 @@ SetCompress auto			# Compress if saves space
 SetCompressor /solid lzma	# Compress whole installer as one block
 SetDatablockOptimize off	# Only saves us 0.1%, not worth it
 XPStyle on                  # Add an XP manifest to the installer
-RequestExecutionLevel admin	# For when we write to Program Files
+RequestExecutionLevel highest           # match MULTIUSER_EXECUTIONLEVEL
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Project flags
@@ -80,9 +80,12 @@ Name ${INSTNAME}
 
 SubCaption 0 $(LicenseSubTitleSetup)	# Override "license agreement" text
 
+!define MUI_ICON   "%%SOURCE%%\installers\windows\install_icon.ico"
+!define MUI_UNICON "%%SOURCE%%\installers\windows\uninstall_icon.ico"
+
 BrandingText " "						# Bottom of window text
-Icon          %%SOURCE%%\installers\windows\install_icon.ico
-UninstallIcon %%SOURCE%%\installers\windows\uninstall_icon.ico
+Icon          "${MUI_ICON}"
+UninstallIcon "${MUI_UNICON}"
 WindowIcon on							# Show our icon in left corner
 BGGradient off							# No big background window
 CRCCheck on								# Make sure CRC is OK
@@ -90,20 +93,43 @@ InstProgressFlags smooth colored		# New colored smooth look
 SetOverwrite on							# Overwrite files by default
 AutoCloseWindow true					# After all files install, close window
 
-# initial location of install (default when not already installed)
-#   note: Now we defer looking for existing install until onInit when we
-#   are able to engage the 32/64 registry function
-InstallDir "%%PROGRAMFILES%%\${INSTNAME}"
+# Registry key paths, ours and Microsoft's
+!define LINDEN_KEY      "SOFTWARE\Linden Research, Inc."
+!define INSTNAME_KEY    "${LINDEN_KEY}\${INSTNAME}"
+!define MSCURRVER_KEY   "SOFTWARE\Microsoft\Windows\CurrentVersion"
+!define MSNTCURRVER_KEY "SOFTWARE\Microsoft\Windows NT\CurrentVersion"
+!define MSUNINSTALL_KEY "${MSCURRVER_KEY}\Uninstall\${INSTNAME}"
+
+# from http://nsis.sourceforge.net/Docs/MultiUser/Readme.html
+# Highest level permitted for user: Admin for Admin, Standard for Standard
+!define MULTIUSER_EXECUTIONLEVEL Highest
+!define MULTIUSER_MUI
+# Look for /AllUsers or /CurrentUser switches
+!define MULTIUSER_INSTALLMODE_COMMANDLINE
+# appended to $PROGRAMFILES, as affected by MULTIUSER_USE_PROGRAMFILES64
+!define MULTIUSER_INSTALLMODE_INSTDIR "${INSTNAME}"
+# expands to !define MULTIUSER_USE_PROGRAMFILES64 or nothing
+%%PROGRAMFILES%%
+# should make MultiUser.nsh initialization read existing INSTDIR from registry
+!define MULTIUSER_INSTALLMODE_INSTDIR_REGISTRY_KEY "${INSTNAME_KEY}"
+!define MULTIUSER_INSTALLMODE_INSTDIR_REGISTRY_VALUENAME ""
+# should make MultiUser.nsh initialization write $MultiUser.InstallMode to registry
+!define MULTIUSER_INSTALLMODE_DEFAULT_REGISTRY_KEY "${INSTNAME_KEY}"
+!define MULTIUSER_INSTALLMODE_DEFAULT_REGISTRY_VALUENAME "InstallMode"
+!include MultiUser.nsh
+!include MUI2.nsh
 
 UninstallText $(UninstallTextMsg)
 DirText $(DirectoryChooseTitle) $(DirectoryChooseSetup)
-Page directory dirPre
-Page instfiles
+!insertmacro MULTIUSER_PAGE_INSTALLMODE
+!define MUI_PAGE_CUSTOMFUNCTION_PRE dirPre
+!insertmacro MUI_PAGE_DIRECTORY
+!insertmacro MUI_PAGE_INSTFILES
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Variables
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-Var INSTPROG
+Var INSTNAME
 Var INSTEXE
 Var VIEWER_EXE
 Var INSTSHORTCUT
@@ -142,20 +168,13 @@ FunctionEnd
 ;; entry to the language ID selector below
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 Function .onInit
+!insertmacro MULTIUSER_INIT
 
 %%ENGAGEREGISTRY%%
 
-# read the current location of the install for this version
-# if $0 is empty, this is the first time for this viewer name
-ReadRegStr $0 HKEY_LOCAL_MACHINE "SOFTWARE\\Linden Research, Inc.\\${INSTNAME}" ""
-
-# viewer with this name not installed before
-${If} $0 == ""
-    # nothing to do here
-${Else}
-	# use the value we got from registry as install location
-    StrCpy $INSTDIR $0
-${EndIf}
+# Setting MULTIUSER_INSTALLMODE_INSTDIR_REGISTRY_KEY and
+# MULTIUSER_INSTALLMODE_INSTDIR_REGISTRY_VALUENAME should
+# read the current location of the install for this version into INSTDIR.
 
 Call CheckCPUFlags							# Make sure we have SSE2 support
 Call CheckWindowsVersion					# Don't install On unsupported systems
@@ -181,7 +200,7 @@ Call CheckWindowsVersion					# Don't install On unsupported systems
 lbl_configure_default_lang:
 # If we currently have a version of SL installed, default to the language of that install
 # Otherwise don't change $LANGUAGE and it will default to the OS UI language.
-    ReadRegStr $0 HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\${INSTNAME}" "InstallerLanguage"
+    ReadRegStr $0 SHELL_CONTEXT "${INSTNAME_KEY}" "InstallerLanguage"
     IfErrors +2 0	# If error skip the copy instruction 
 	StrCpy $LANGUAGE $0
 
@@ -204,7 +223,7 @@ lbl_build_menu:
     StrCpy $LANGUAGE $0
 
 # Save language in registry		
-	WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\${INSTNAME}" "InstallerLanguage" $LANGUAGE
+	WriteRegStr SHELL_CONTEXT "${INSTNAME_KEY}" "InstallerLanguage" $LANGUAGE
 lbl_return:
     Pop $0
     Return
@@ -215,16 +234,20 @@ FunctionEnd
 ;; Prep Uninstaller Section
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 Function un.onInit
+!insertmacro MULTIUSER_UNINIT
 
 %%ENGAGEREGISTRY%%
 
 # Read language from registry and set for uninstaller. Key will be removed on successful uninstall
-	ReadRegStr $0 HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\${INSTNAME}" "InstallerLanguage"
+	ReadRegStr $0 SHELL_CONTEXT "${INSTNAME_KEY}" "InstallerLanguage"
     IfErrors lbl_end
 	StrCpy $LANGUAGE $0
 lbl_end:
     Return
 
+    # Does MultiUser.nsh init read back
+    # MULTIUSER_INSTALLMODE_DEFAULT_REGISTRY_KEY into $MultiUser.InstallMode?
+
 FunctionEnd
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -272,15 +295,14 @@ FunctionEnd
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 Section ""
 
-SetShellVarContext all			# Install for all users (if you change this, change it in the uninstall as well)
+# SetShellVarContext is set by MultiUser.nsh initialization.
 
 # Start with some default values.
-StrCpy $INSTPROG "${INSTNAME}"
+StrCpy $INSTNAME "${INSTNAME}"
 StrCpy $INSTEXE "${INSTEXE}"
 StrCpy $VIEWER_EXE "${VIEWER_EXE}"
 StrCpy $INSTSHORTCUT "${SHORTCUT}"
 
-Call CheckIfAdministrator		# Make sure the user can install/uninstall
 Call CloseSecondLife			# Make sure Second Life not currently running
 Call CheckWillUninstallV2		# Check if Second Life is already installed
 
@@ -299,7 +321,7 @@ StrCpy $SHORTCUT_LANG_PARAM "--set InstallLanguage $(LanguageCode)"
 CreateDirectory	"$SMPROGRAMS\$INSTSHORTCUT"
 SetOutPath "$INSTDIR"
 CreateShortCut	"$SMPROGRAMS\$INSTSHORTCUT\$INSTSHORTCUT.lnk" \
-				"$INSTDIR\$INSTEXE" "$SHORTCUT_LANG_PARAM" "$INSTDIR\$VIEWER_EXE"
+				"$INSTDIR\$VIEWER_EXE" "$SHORTCUT_LANG_PARAM" "$INSTDIR\$VIEWER_EXE"
 
 
 WriteINIStr		"$SMPROGRAMS\$INSTSHORTCUT\SL Create Account.url" \
@@ -317,31 +339,31 @@ CreateShortCut	"$SMPROGRAMS\$INSTSHORTCUT\Uninstall $INSTSHORTCUT.lnk" \
 # Other shortcuts
 SetOutPath "$INSTDIR"
 CreateShortCut "$DESKTOP\$INSTSHORTCUT.lnk" \
-        "$INSTDIR\$INSTEXE" "$SHORTCUT_LANG_PARAM" "$INSTDIR\$VIEWER_EXE"
+        "$INSTDIR\$VIEWER_EXE" "$SHORTCUT_LANG_PARAM" "$INSTDIR\$VIEWER_EXE"
 CreateShortCut "$INSTDIR\$INSTSHORTCUT.lnk" \
-        "$INSTDIR\$INSTEXE" "$SHORTCUT_LANG_PARAM" "$INSTDIR\$VIEWER_EXE"
+        "$INSTDIR\$VIEWER_EXE" "$SHORTCUT_LANG_PARAM" "$INSTDIR\$VIEWER_EXE"
 CreateShortCut "$INSTDIR\Uninstall $INSTSHORTCUT.lnk" \
 				'"$INSTDIR\uninst.exe"' ''
 
 # Write registry
-WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\$INSTPROG" "" "$INSTDIR"
-WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\$INSTPROG" "Version" "${VERSION_LONG}"
-WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\$INSTPROG" "Shortcut" "$INSTSHORTCUT"
-WriteRegStr HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\$INSTPROG" "Exe" "$INSTEXE"
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "Publisher" "Linden Research, Inc."
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "URLInfoAbout" "http://secondlife.com/whatis/"
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "URLUpdateInfo" "http://secondlife.com/support/downloads/"
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "HelpLink" "https://support.secondlife.com/contact-support/"
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "DisplayName" "$INSTPROG"
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "UninstallString" '"$INSTDIR\uninst.exe"'
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "DisplayVersion" "${VERSION_LONG}"
-WriteRegDWORD HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "EstimatedSize" "0x0001D500"		# ~117 MB
+WriteRegStr SHELL_CONTEXT "${INSTNAME_KEY}" "" "$INSTDIR"
+WriteRegStr SHELL_CONTEXT "${INSTNAME_KEY}" "Version" "${VERSION_LONG}"
+WriteRegStr SHELL_CONTEXT "${INSTNAME_KEY}" "Shortcut" "$INSTSHORTCUT"
+WriteRegStr SHELL_CONTEXT "${INSTNAME_KEY}" "Exe" "$VIEWER_EXE"
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "Publisher" "Linden Research, Inc."
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "URLInfoAbout" "http://secondlife.com/whatis/"
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "URLUpdateInfo" "http://secondlife.com/support/downloads/"
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "HelpLink" "https://support.secondlife.com/contact-support/"
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "DisplayName" "$INSTNAME"
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "UninstallString" '"$INSTDIR\uninst.exe"'
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "DisplayVersion" "${VERSION_LONG}"
+WriteRegDWORD SHELL_CONTEXT "${MSUNINSTALL_KEY}" "EstimatedSize" "0x0001D500"		# ~117 MB
 
 # from FS:Ansariel
-WriteRegStr HKEY_LOCAL_MACHINE "Software\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG" "DisplayIcon" '"$INSTDIR\$INSTEXE"'
+WriteRegStr SHELL_CONTEXT "${MSUNINSTALL_KEY}" "DisplayIcon" '"$INSTDIR\$VIEWER_EXE"'
 
 # BUG-2707 Disable SEHOP for installed viewer.
-WriteRegDWORD HKEY_LOCAL_MACHINE "Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\$INSTEXE" "DisableExceptionChainValidation" 1
+WriteRegDWORD SHELL_CONTEXT "${MSNTCURRVER_KEY}\Image File Execution Options\$VIEWER_EXE" "DisableExceptionChainValidation" 1
 
 # Write URL registry info
 WriteRegStr HKEY_CLASSES_ROOT "${URLNAME}" "(default)" "URL:Second Life"
@@ -358,9 +380,8 @@ WriteRegStr HKEY_CLASSES_ROOT "x-grid-location-info\DefaultIcon" "" '"$INSTDIR\$
 # URL param must be last item passed to viewer, it ignores subsequent params to avoid parameter injection attacks.
 WriteRegExpandStr HKEY_CLASSES_ROOT "x-grid-location-info\shell\open\command" "" '"$INSTDIR\$VIEWER_EXE" -url "%1"'
 
-# Only allow Launcher to be the icon
-WriteRegStr HKEY_CLASSES_ROOT "Applications\$INSTEXE" "IsHostApp" ""
-WriteRegStr HKEY_CLASSES_ROOT "Applications\${VIEWER_EXE}" "NoStartPage" ""
+WriteRegStr HKEY_CLASSES_ROOT "Applications\$VIEWER_EXE" "IsHostApp" ""
+##WriteRegStr HKEY_CLASSES_ROOT "Applications\${VIEWER_EXE}" "NoStartPage" ""
 
 # Write out uninstaller
 WriteUninstaller "$INSTDIR\uninst.exe"
@@ -381,25 +402,30 @@ SectionEnd
 Section Uninstall
 
 # Start with some default values.
-StrCpy $INSTPROG "${INSTNAME}"
+StrCpy $INSTNAME "${INSTNAME}"
 StrCpy $INSTEXE "${INSTEXE}"
+StrCpy $VIEWER_EXE "${VIEWER_EXE}"
 StrCpy $INSTSHORTCUT "${SHORTCUT}"
 
-# Make sure the user can install/uninstall
-Call un.CheckIfAdministrator
-
-# Uninstall for all users (if you change this, change it in the install as well)
-SetShellVarContext all			
+# SetShellVarContext per the mode saved at install time in registry at
+# MULTIUSER_INSTALLMODE_DEFAULT_REGISTRY_KEY
+# MULTIUSER_INSTALLMODE_DEFAULT_REGISTRY_VALUENAME
+# Couln't get NSIS to expand $MultiUser.InstallMode into the function name at Call time
+${If} $MultiUser.InstallMode == 'AllUsers'
+  Call un.MultiUser.InstallMode.AllUsers
+${Else}
+  Call un.MultiUser.InstallMode.CurrentUser
+${EndIf}
 
 # Make sure we're not running
 Call un.CloseSecondLife
 
 # Clean up registry keys and subkeys (these should all be !defines somewhere)
-DeleteRegKey HKEY_LOCAL_MACHINE "SOFTWARE\Linden Research, Inc.\$INSTPROG"
-DeleteRegKey HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\$INSTPROG"
+DeleteRegKey SHELL_CONTEXT "${INSTNAME_KEY}"
+DeleteRegKey SHELL_CONTEXT "${MSCURRVER_KEY}\Uninstall\$INSTNAME"
 # BUG-2707 Remove entry that disabled SEHOP
-DeleteRegKey HKEY_LOCAL_MACHINE "Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\$INSTEXE"
-DeleteRegKey HKEY_CLASSES_ROOT "Applications\$INSTEXE"
+DeleteRegKey SHELL_CONTEXT "${MSNTCURRVER_KEY}\Image File Execution Options\$VIEWER_EXE"
+##DeleteRegKey HKEY_CLASSES_ROOT "Applications\$INSTEXE"
 DeleteRegKey HKEY_CLASSES_ROOT "Applications\${VIEWER_EXE}"
 
 # Clean up shortcuts
@@ -419,36 +445,6 @@ Call un.UserSettingsFiles
 SectionEnd
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; Make sure the user can install
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-Function CheckIfAdministrator
-    DetailPrint $(CheckAdministratorInstDP)
-    UserInfo::GetAccountType
-    Pop $R0
-    StrCmp $R0 "Admin" lbl_is_admin
-        MessageBox MB_OK $(CheckAdministratorInstMB)
-        Quit
-lbl_is_admin:
-    Return
-
-FunctionEnd
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; Make sure the user can uninstall
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-Function un.CheckIfAdministrator
-    DetailPrint $(CheckAdministratorUnInstDP)
-    UserInfo::GetAccountType
-    Pop $R0
-    StrCmp $R0 "Admin" lbl_is_admin
-        MessageBox MB_OK $(CheckAdministratorUnInstMB)
-        Quit
-lbl_is_admin:
-    Return
-
-FunctionEnd
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Function CheckWillUninstallV2               
 ;;
 ;; If called through auto-update, need to uninstall any existing V2 installation.
@@ -537,6 +533,7 @@ Function RemoveProgFilesOnInst
 
 # Remove old SecondLife.exe to invalidate any old shortcuts to it that may be in non-standard locations. See MAINT-3575
 Delete "$INSTDIR\$INSTEXE"
+Delete "$INSTDIR\$VIEWER_EXE"
 
 # Remove old shader files first so fallbacks will work. See DEV-5663
 RMDir /r "$INSTDIR\app_settings\shaders"
@@ -570,10 +567,10 @@ Push $2
   StrCpy $0 0	# Index number used to iterate via EnumRegKey
 
   LOOP:
-    EnumRegKey $1 HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList" $0
+    EnumRegKey $1 SHELL_CONTEXT "${MSNTCURRVER_KEY}\ProfileList" $0
     StrCmp $1 "" DONE               # No more users
 
-    ReadRegStr $2 HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\$1" "ProfileImagePath" 
+    ReadRegStr $2 SHELL_CONTEXT "${MSNTCURRVER_KEY}\ProfileList\$1" "ProfileImagePath" 
     StrCmp $2 "" CONTINUE 0         # "ProfileImagePath" value is missing
 
 # Required since ProfileImagePath is of type REG_EXPAND_SZ
@@ -603,7 +600,7 @@ Pop $0
 
 # Delete files in ProgramData\Secondlife
 Push $0
-  ReadRegStr $0 HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" "Common AppData"
+  ReadRegStr $0 SHELL_CONTEXT "${MSCURRVER_KEY}\Explorer\Shell Folders" "Common AppData"
   StrCmp $0 "" +2
   RMDir /r "$0\SecondLife"
 Pop $0
@@ -660,8 +657,8 @@ NOFOLDER:
 MessageBox MB_YESNO $(DeleteRegistryKeysMB) IDYES DeleteKeys IDNO NoDelete
 
 DeleteKeys:
-  DeleteRegKey HKEY_LOCAL_MACHINE "SOFTWARE\Classes\x-grid-location-info"
-  DeleteRegKey HKEY_LOCAL_MACHINE "SOFTWARE\Classes\secondlife"
+  DeleteRegKey SHELL_CONTEXT "SOFTWARE\Classes\x-grid-location-info"
+  DeleteRegKey SHELL_CONTEXT "SOFTWARE\Classes\secondlife"
   DeleteRegKey HKEY_CLASSES_ROOT "x-grid-location-info"
   DeleteRegKey HKEY_CLASSES_ROOT "secondlife"
 
@@ -673,7 +670,7 @@ FunctionEnd
 ;; After install completes, launch app
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 Function .onInstSuccess
-Call CheckWindowsServPack		# Warn if not on the latest SP before asking to launch.
+        Call CheckWindowsServPack		# Warn if not on the latest SP before asking to launch.
         Push $R0
         Push $0
         ;; MAINT-7812: Only write nsis.winstall file with /marker switch
@@ -694,8 +691,21 @@ Call CheckWindowsServPack		# Warn if not on the latest SP before asking to launc
         Pop $R0
         Push $R0					# Option value, unused# 
         StrCmp $SKIP_AUTORUN "true" +2;
-# Assumes SetOutPath $INSTDIR
-	Exec '"$WINDIR\explorer.exe" "$INSTDIR\$INSTSHORTCUT.lnk"'
+        # Assumes SetOutPath $INSTDIR
+        # Run INSTEXE (our updater), passing VIEWER_EXE plus the command-line
+        # arguments built into our shortcuts. This gives the updater a chance
+        # to verify that the viewer we just installed is appropriate for the
+        # running system -- or, if not, to download and install a different
+        # viewer. For instance, if a user running 32-bit Windows installs a
+        # 64-bit viewer, it cannot run on this system. But since the updater
+        # is a 32-bit executable even in the 64-bit viewer package, the
+        # updater can detect the problem and adapt accordingly.
+        # Once everything is in order, the updater will run the specified
+        # viewer with the specified params.
+        # Quote the updater executable and the viewer executable because each
+        # must be a distinct command-line token, but DO NOT quote the language
+        # string because it must decompose into separate command-line tokens.
+        Exec '"$INSTDIR\$INSTEXE" precheck "$INSTDIR\$VIEWER_EXE" $SHORTCUT_LANG_PARAM'
         Pop $R0
 # 
 FunctionEnd
@@ -733,10 +743,10 @@ FunctionEnd
 ;    StrCpy $0 0	# Index number used to iterate via EnumRegKey
 ;
 ;  LOOP:
-;    EnumRegKey $1 HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList" $0
+;    EnumRegKey $1 SHELL_CONTEXT "${MSNTCURRVER_KEY}\ProfileList" $0
 ;    StrCmp $1 "" DONE               # no more users
 ;
-;    ReadRegStr $2 HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\$1" "ProfileImagePath"
+;    ReadRegStr $2 SHELL_CONTEXT "${MSNTCURRVER_KEY}\ProfileList\$1" "ProfileImagePath"
 ;    StrCmp $2 "" CONTINUE 0         # "ProfileImagePath" value is missing
 ;
 ;# Required since ProfileImagePath is of type REG_EXPAND_SZ
@@ -755,7 +765,7 @@ FunctionEnd
 ;
 ;# Copy files in Documents and Settings\All Users\SecondLife
 ;Push $0
-;    ReadRegStr $0 HKEY_LOCAL_MACHINE "SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders" "Common AppData"
+;    ReadRegStr $0 SHELL_CONTEXT "${MSCURRVER_KEY}\Explorer\Shell Folders" "Common AppData"
 ;    StrCmp $0 "" +2
 ;    RMDir /r "$2\Application Data\SecondLife\"
 ;Pop $0
diff --git a/indra/newview/installers/windows/lang_da.nsi b/indra/newview/installers/windows/lang_da.nsi
index 83e1a3ea94..b3b8cf34d5 100644
--- a/indra/newview/installers/windows/lang_da.nsi
+++ b/indra/newview/installers/windows/lang_da.nsi
diff --git a/indra/newview/installers/windows/lang_de.nsi b/indra/newview/installers/windows/lang_de.nsi
index 2a868acc89..7758a3bda6 100644
--- a/indra/newview/installers/windows/lang_de.nsi
+++ b/indra/newview/installers/windows/lang_de.nsi
diff --git a/indra/newview/installers/windows/lang_en-us.nsi b/indra/newview/installers/windows/lang_en-us.nsi
index 00aa47de69..1e81c5294a 100644
--- a/indra/newview/installers/windows/lang_en-us.nsi
+++ b/indra/newview/installers/windows/lang_en-us.nsi
diff --git a/indra/newview/installers/windows/lang_es.nsi b/indra/newview/installers/windows/lang_es.nsi
index 1ecf254ffb..6d4a7495a6 100644
--- a/indra/newview/installers/windows/lang_es.nsi
+++ b/indra/newview/installers/windows/lang_es.nsi
diff --git a/indra/newview/installers/windows/lang_fr.nsi b/indra/newview/installers/windows/lang_fr.nsi
index bec5835bed..421015fc6b 100644
--- a/indra/newview/installers/windows/lang_fr.nsi
+++ b/indra/newview/installers/windows/lang_fr.nsi
diff --git a/indra/newview/installers/windows/lang_it.nsi b/indra/newview/installers/windows/lang_it.nsi
index 1d2e150525..df735ba742 100644
--- a/indra/newview/installers/windows/lang_it.nsi
+++ b/indra/newview/installers/windows/lang_it.nsi
diff --git a/indra/newview/installers/windows/lang_ja.nsi b/indra/newview/installers/windows/lang_ja.nsi
index 1bd6526670..f2cc1f9fde 100644
--- a/indra/newview/installers/windows/lang_ja.nsi
+++ b/indra/newview/installers/windows/lang_ja.nsi
diff --git a/indra/newview/installers/windows/lang_pl.nsi b/indra/newview/installers/windows/lang_pl.nsi
index a172f0cdeb..61dc769126 100644
--- a/indra/newview/installers/windows/lang_pl.nsi
+++ b/indra/newview/installers/windows/lang_pl.nsi
diff --git a/indra/newview/installers/windows/lang_pt-br.nsi b/indra/newview/installers/windows/lang_pt-br.nsi
index 87032fec18..d481434ab2 100644
--- a/indra/newview/installers/windows/lang_pt-br.nsi
+++ b/indra/newview/installers/windows/lang_pt-br.nsi
diff --git a/indra/newview/installers/windows/lang_ru.nsi b/indra/newview/installers/windows/lang_ru.nsi
index 019c66123c..a42c719169 100644
--- a/indra/newview/installers/windows/lang_ru.nsi
+++ b/indra/newview/installers/windows/lang_ru.nsi
diff --git a/indra/newview/installers/windows/lang_tr.nsi b/indra/newview/installers/windows/lang_tr.nsi
index 1c4e2c2f48..c320764fac 100644
--- a/indra/newview/installers/windows/lang_tr.nsi
+++ b/indra/newview/installers/windows/lang_tr.nsi
diff --git a/indra/newview/installers/windows/lang_zh.nsi b/indra/newview/installers/windows/lang_zh.nsi
index 355e01a333..8da802df68 100644
--- a/indra/newview/installers/windows/lang_zh.nsi
+++ b/indra/newview/installers/windows/lang_zh.nsi