diff --git a/development/Win32/packaging/installer/ChangeLog.txt b/development/Win32/packaging/installer/ChangeLog.txt
index 44020a7932..56d64250a4 100644
--- a/development/Win32/packaging/installer/ChangeLog.txt
+++ b/development/Win32/packaging/installer/ChangeLog.txt
@@ -1,4 +1,50 @@
-Changelog for LyX-207-4:
+Changelog for LyX-212-2:
+- fix problem that some LaTeX language packages were not installed automatically
+  leading to LaTeX errors when compiling LyX documents 
+- new spell checker for Turkish
+- updated spell-checker dictionaries for English, Norwegian(Bokmal), Portuguese
+  and Scottish
+  (To benefit from them you must uninstall an already installed LyX 2.1.x and
+   then use this installer.)
+- updated thesaurus for Slovenian
+  (you need to reinstall LyX to benefit from this)
+- updated to Python 2.7.9
+
+
+Changelog for LyX-212-1:
+- installs LyX 2.1.2
+
+
+Changelog for LyX-211-2:
+- updated to Python 2.7.8
+
+
+Changelog for LyX-211-1:
+- installs LyX 2.1.1
+- updated to Ghostscript 8.14
+- updated to Qt 4.8.6
+
+
+Changelog for LyX-210-2:
+- LyX can now also be installed over an existing installation of the same LyX version
+  if the users really wants this.
+- LyX can now also be installed if the uninstaller executable of a former LyX was
+  accidentally deleted.
+- If a user set MiKTeX's automatic package installation to "No" the installer will
+  respect that and not re-enable it.
+
+
+Changelog for LyX-210-1:
+- installs LyX 2.1.0
+- fixed a bug that MiKTeX was not found if Windows' PATH variable is very long
+
+
+Changelog for LyX-208-1:
+- installs LyX 2.0.8
+- fixed a bug that MiKTeX was not found if Windows' PATH variable is very long
+
+
+Changelog for LyX-207-4:
 - downgraded to Qt 4.8.4
   (there is a bug in the newer Qt 4.8.5 that destroys some shortcuts)
 - updated to JabRef 2.10
diff --git a/development/Win32/packaging/installer/HunspellDictionaryNames.txt b/development/Win32/packaging/installer/HunspellDictionaryNames.txt
index dd4b08f5d9..aba877cc7e 100644
--- a/development/Win32/packaging/installer/HunspellDictionaryNames.txt
+++ b/development/Win32/packaging/installer/HunspellDictionaryNames.txt
@@ -132,6 +132,8 @@ th_TH.aff
 th_TH.dic
 tk_TM.aff
 tk_TM.dic
+tr_TR.aff
+tr_TR.dic
 uk_UA.aff
 uk_UA.dic
 ur_PK.aff
diff --git a/development/Win32/packaging/installer/Packages.txt b/development/Win32/packaging/installer/Packages.txt
index 5e21df53c9..70af0bb6e2 100644
--- a/development/Win32/packaging/installer/Packages.txt
+++ b/development/Win32/packaging/installer/Packages.txt
@@ -8,7 +8,6 @@ apacite
 apalike
 arabi
 authordate
-babel
 babel-albanian
 babel-bahasa
 babel-basque
@@ -57,7 +56,6 @@ babel-ukrainian
 babel-vietnamese
 babel-welsh
 bibtopic
-bidi
 booktabs
 braille
 breakurl
@@ -70,28 +68,22 @@ endnotes
 enumitem
 esint
 eso-pic
-fontspec
 fancybox
 fancyhdr
 filehook
-float
 framed
-geometry
 greek-inputenc
 harvard
-hyperref
 hyphenat
 iftex
 jurabib
 lettrine
 listings
 lithuanian
-luainputenc
 genmisc
 mhchem
 mongolian-babel
 miktex-hyph-mongolian
-multirow
 natbib
 units
 nomencl
@@ -107,6 +99,7 @@ sectionbox
 serbianc
 miktex-hyph-serbian
 setspace
+shapepar
 soul
 splitindex
 subfig
@@ -123,7 +116,6 @@ wrapfig
 xargs
 xcolor
 xetex-def
-xkeyval
 arydshln
 binhex
 braket
@@ -132,7 +124,6 @@ caption
 colortbl
 diagbox
 etoolbox
-eurosym
 fp
 koma-script
 makecmds
@@ -142,14 +133,9 @@ pict2e
 sidecap
 was
 charter
-courier
 garamondx
-helvet
 mathpazo
-utopia
-ae
 bera
-cbgreek
 ccfonts
 cmbright
 concmath
@@ -160,14 +146,19 @@ eulervm
 feyn
 fontaxes
 fourier
+iwona
+kurier
 lh
-lmodern
+libertine
 lm-math
 luxi
-mdput
+minion2newtx
 mslapa
+newtx
 stmaryrd
 symbol
+tex-gyre
+tfrupee
 tipa
 txfonts
 wasy
@@ -195,6 +186,7 @@ ctex
 dinbrief
 dtk
 elsarticle
+elsevier
 endfloat
 epsf
 europecv
@@ -224,6 +216,7 @@ placeins
 powerdot
 pst-grad
 pst-node
+revtex
 revtex4
 sauerj
 savesym
@@ -241,4 +234,11 @@ ucs
 upquote
 xecjk
 xifthen
+answers
+chicago
+frankenstein
+jsclasses
+lambda-lists
+mathdesign
+mathtools
 pdfcrop
\ No newline at end of file
diff --git a/development/Win32/packaging/installer/include/dictionaries.nsh b/development/Win32/packaging/installer/include/dictionaries.nsh
index ddef3c7811..d66c984766 100644
--- a/development/Win32/packaging/installer/include/dictionaries.nsh
+++ b/development/Win32/packaging/installer/include/dictionaries.nsh
@@ -28,8 +28,8 @@ Function FindDictionaries
   
   # read out the possible spell-checker filenames from the file	
   FileOpen $R5 "$INSTDIR\Resources\HunspellDictionaryNames.txt" r
-  ${for} $5 1 70
-   # the file has 140 lines, but we only need to check for one of the 2 dictionary files per language
+  ${for} $5 1 71
+   # the file has 142 lines, but we only need to check for one of the 2 dictionary files per language
    # therefore check only for every second line
    FileRead $R5 $String   # skip the .aff file
    FileRead $R5 $String   # $String is now the .dic filename
@@ -66,7 +66,7 @@ Function DownloadHunspellDictionaries
  
  # read out the locations from the file	
  FileOpen $R5 "$INSTDIR\Resources\HunspellDictionaryNames.txt" r
- ${For} $5 1 140       # the file has 140 lines
+ ${For} $5 1 142       # the file has 142 lines
  
   FileRead $R5 $String # $String is now the dictionary name
   StrCpy $R3 $String -6 # $R3 is now the dictionary language code
diff --git a/development/Win32/packaging/installer/include/init.nsh b/development/Win32/packaging/installer/include/init.nsh
index b58478ad4d..d01ec8d66a 100644
--- a/development/Win32/packaging/installer/include/init.nsh
+++ b/development/Win32/packaging/installer/include/init.nsh
@@ -167,14 +167,14 @@ SectionEnd
 
 Section /o "English (CA)" SecDEnglishCA
  StrCpy $DictCodes "en_CA,$DictCodes"
- AddSize 690
+ AddSize 531
 SectionEnd
 
 Section "English (GB)" SecDEnglishGB
  # already installed by default
  SectionIn RO
  #StrCpy $DictCodes "en_GB,$DictCodes"
- AddSize 757
+ AddSize 652
 SectionEnd
 
 Section /o "English (NZ)" SecDEnglishNZ
@@ -186,7 +186,7 @@ Section "English (US)" SecDEnglishUS
  # already installed by default
  SectionIn RO
  #StrCpy $DictCodes "en_US,$DictCodes"
- AddSize 688
+ AddSize 530
 SectionEnd
 
 Section "Español (ES)" SecDSpanishES
@@ -237,7 +237,7 @@ SectionEnd
 
 Section /o "Gàidhlig" SecDScottish
  StrCpy $DictCodes "gd_GB,$DictCodes"
- AddSize 2504
+ AddSize 3090
 SectionEnd
 
 Section /o "Galego" SecDGalician
@@ -322,7 +322,7 @@ SectionEnd
 
 Section /o "Norsk (Nynorsk)" SecDNorwegianNN
  StrCpy $DictCodes "nn_NO,$DictCodes"
- AddSize 1515
+ AddSize 1540
 SectionEnd
 
 Section /o "Occitan" SecDOccitan
@@ -342,7 +342,7 @@ SectionEnd
 
 Section /o "Português (PT)" SecDPortuguesePT
  StrCpy $DictCodes "pt_PT,$DictCodes"
- AddSize 1595
+ AddSize 1490
 SectionEnd
 
 Section /o "Româna" SecDRomanian
@@ -415,6 +415,11 @@ Section /o "T
  AddSize 950
 SectionEnd
 
+Section /o "Türkçe" SecDTurkish
+ StrCpy $DictCodes "tr_TR,$DictCodes"
+ AddSize 8870
+SectionEnd
+
 Section /o "Ukrainian" SecDUkrainian
  StrCpy $DictCodes "uk_UA,$DictCodes"
  AddSize 3077
@@ -542,7 +547,7 @@ SectionEnd
 
 Section /o "Slovenšcina" SecTSlovenian
  StrCpy $ThesCodes "sl_SI,$ThesCodes"
- AddSize 1121
+ AddSize 1110
 SectionEnd
 
 Section /o "Slovenský" SecTSlovakian
@@ -626,17 +631,31 @@ Function .onInit
   # check if this LyX version is already installed
   ${if} $MultiUser.Privileges == "Admin"
   ${orif} $MultiUser.Privileges == "Power"
-   ReadRegStr $0 HKLM "${APP_UNINST_KEY}" "Publisher"
+   ReadRegStr $0 HKLM "${APP_UNINST_KEY}" "DisplayIcon"
   ${else}
-   ReadRegStr $0 HKCU "${APP_UNINST_KEY}" "Publisher"
+   ReadRegStr $0 HKCU "${APP_UNINST_KEY}" "DisplayIcon"
    # handle also the case that LyX is already installed in HKLM
    ${if} $0 == ""
-    ReadRegStr $0 HKLM "${APP_UNINST_KEY}" "Publisher"
+    ReadRegStr $0 HKLM "${APP_UNINST_KEY}" "DisplayIcon"
    ${endif}
   ${endif}
   ${if} $0 != ""
-   MessageBox MB_OK|MB_ICONSTOP "$(StillInstalled)" /SD IDOK
+   # check if the uninstaller was acidentally deleted
+   # if so don't bother the user if he realy wants to install a new LyX over an existing one
+   # because he won't have a chance to deny this
+   StrCpy $4 $0 -10 # remove '\bin\lyx,0'
+   # (for FileCheck the variables $0 and $1 cannot be used)
+   !insertmacro FileCheck $5 "Uninstall-LyX.exe" "$4" # macro from LyXUtils.nsh
+   ${if} $5 == "False"
+    Goto ForceInstallation
+   ${endif}
+   # installing over an existing installation of the same LyX release is not necessary
+   # if the users does this he most probably has a problem with LyX that can better be solved
+   # by reinstalling LyX
+   # for beta and other test releases over-installing can even cause errors
+   MessageBox MB_YESNO|MB_DEFBUTTON2|MB_ICONEXCLAMATION "$(AlreadyInstalled)" /SD IDNO IDYES ForceInstallation 
    Abort
+   ForceInstallation:
   ${endif}
   
   # check if there is an existing LyX installation of the same LyX series
@@ -1166,6 +1185,13 @@ Function .onInit
    SectionSetFlags ${SecDTurkmen} $0
    SectionSetSize ${SecDTurkmen} 0
   ${endif}
+  StrCpy $Search "tr_TR"
+  Call StrPoint
+  ${if} $Pointer != "-1"
+   IntOp $0 ${SF_SELECTED} | ${SF_RO}
+   SectionSetFlags ${SecDTurkish} $0
+   SectionSetSize ${SecDTurkish} 0
+  ${endif}
   StrCpy $Search "uk_UA"
   Call StrPoint
   ${if} $Pointer != "-1"
diff --git a/development/Win32/packaging/installer/settings.nsh b/development/Win32/packaging/installer/settings.nsh
index cc52db455b..6177069c19 100644
--- a/development/Win32/packaging/installer/settings.nsh
+++ b/development/Win32/packaging/installer/settings.nsh
@@ -11,10 +11,10 @@ These typically need to be modified for each LyX release
 
 !define APP_VERSION_MAJOR 2
 !define APP_VERSION_MINOR 1
-!define APP_VERSION_REVISION 0
+!define APP_VERSION_REVISION 2
 !define APP_VERSION_EMERGENCY "" # use "1" for an emergency release of LyX otherwise ""
 !define APP_EMERGENCY_DOT "" # use "." for an emergency release of LyX otherwise ""
-!define APP_VERSION_BUILD 1 # Start with 1 for the installer releases of each version
+!define APP_VERSION_BUILD 2 # Start with 1 for the installer releases of each version
 
 !define APP_VERSION "${APP_VERSION_MAJOR}.${APP_VERSION_MINOR}.${APP_VERSION_REVISION}${APP_EMERGENCY_DOT}${APP_VERSION_EMERGENCY}" # Version to display
 
@@ -37,9 +37,9 @@ These typically need to be modified for each LyX release
 # File locations
 # !!! you need to adjust them to the folders in your Windows system !!!
 
-!define FILES_LYX "C:\LyX\LyXPackage\LyX"
-!define FILES_DEPS "C:\LyX\LyX2.0x\lyx-windows-deps-msvc2008"
-!define FILES_QT "C:\LyX\LyXPackage\LyX"
+!define FILES_LYX "D:\LyXPackage2.1\LyX"
+!define FILES_DEPS "D:\LyXGit\Master\lyx-windows-deps-msvc2010"
+!define FILES_QT "C:\Qt\4.8.6"
 !define ClassFileDir "${FILES_LYX}\Resources\tex"
 !define DVIPostFileDir "${FILES_DEPS}\tex"
 
diff --git a/development/Win32/packaging/installer/setup/configure.nsh b/development/Win32/packaging/installer/setup/configure.nsh
index 9e6d18be95..a26bcbef98 100644
--- a/development/Win32/packaging/installer/setup/configure.nsh
+++ b/development/Win32/packaging/installer/setup/configure.nsh
@@ -55,8 +55,8 @@ Section -InstallData
   WriteRegDWORD SHCTX ${APP_UNINST_KEY} "NoRepair" 0x00000001
   WriteRegStr SHCTX ${APP_UNINST_KEY} "StartMenu" "$SMPROGRAMS\$StartmenuFolder"
   
-  # if we install over an existing version, remove the old uninstaller information
-  ${if} $OldVersionNumber != ""
+  # if we install over an older existing version, remove the old uninstaller information
+  ${if} $OldVersionNumber < ${APP_SERIES_KEY}
    DeleteRegKey SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_NAME}$OldVersionNumber"
    # also delete in the case of an emergency release
    DeleteRegKey SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_NAME}$OldVersionNumber1"
@@ -215,17 +215,26 @@ Section -ConfigureScript
   # ask to update MiKTeX
   ${if} $LaTeXInstalled == "MiKTeX"
    Call UpdateMiKTeX # function from latex.nsh
-   # install all necessary packages at once
+   # install all necessary packages at once because this is much faster then to install the packages one by one
+   # NOTE: the babelpackages-txt list is only necessary for LyX 2.1.2 ans 2.1.3 because of the restructuration
+   # of babel in MiKTeX. This can be removed for LyX 2.1.4
    DetailPrint $(TEXT_CONFIGURE_LYX)
    ${if} $MultiUser.Privileges != "Admin"
    ${andif} $MultiUser.Privileges != "Power"
     # call the non-admin version
+    # at first we need to synchronize the package database
+    nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--update-db"'
     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--install-some=$INSTDIR\Resources\Packages.txt"'
+    nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--install-some=$INSTDIR\Resources\babel-Packages.txt"'
    ${else}
     ${if} $MiKTeXUser != "HKCU" # call the admin version
+     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--admin" "--verbose" "--update-db"'
      nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--admin" "--verbose" "--install-some=$INSTDIR\Resources\Packages.txt"'
+     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--admin" "--verbose" "--install-some=$INSTDIR\Resources\babel-Packages.txt"'
     ${else}
+     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--update-db"'
      nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--install-some=$INSTDIR\Resources\Packages.txt"'
+     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--install-some=$INSTDIR\Resources\babel-Packages.txt"'
     ${endif}
    ${endif}
   ${endif}