diff --git a/mswin32/nsis/Nmap.nsi b/mswin32/nsis/Nmap.nsi
index 032da49803..dc260a8378 100644
--- a/mswin32/nsis/Nmap.nsi
+++ b/mswin32/nsis/Nmap.nsi
@@ -240,10 +240,10 @@ Section "Register Nmap Path" SecRegisterPath
   Call AddToPath 
 SectionEnd 
  
-Section "WinPcap 4.1.1" SecWinPcap 
+Section "WinPcap 4.1.2" SecWinPcap 
   SetOutPath "$INSTDIR" 
   SetOverwrite on 
-  File ..\winpcap\winpcap-nmap-4.11.exe 
+  File ..\winpcap\winpcap-nmap-4.12.exe 
   ; If the Nmap installer was launched using /S then pass some arguments to WinPcap
   IfSilent winpcap_silent winpcap_loud
   winpcap_silent:
@@ -254,12 +254,12 @@ Section "WinPcap 4.1.1" SecWinPcap
     StrCmp $2 "NO" 0 NoSkipNPFStartup
     StrCpy $1 "/NPFSTARTUP=NO $1"
     NoSkipNPFStartup:
-    ExecWait '"$INSTDIR\winpcap-nmap-4.11.exe" $1 /S' 
+    ExecWait '"$INSTDIR\winpcap-nmap-4.12.exe" $1 /S' 
     Goto delete_winpcap
   winpcap_loud:
-    ExecWait '"$INSTDIR\winpcap-nmap-4.11.exe"' 
+    ExecWait '"$INSTDIR\winpcap-nmap-4.12.exe"' 
   delete_winpcap:
-  Delete "$INSTDIR\winpcap-nmap-4.11.exe" 
+  Delete "$INSTDIR\winpcap-nmap-4.12.exe" 
 SectionEnd 
 
 Section "Network Performance Improvements" SecPerfRegistryMods 
diff --git a/mswin32/winpcap/LICENSE b/mswin32/winpcap/LICENSE
index 9b14b6bad1..85cec823be 100644
--- a/mswin32/winpcap/LICENSE
+++ b/mswin32/winpcap/LICENSE
@@ -1,5 +1,5 @@
 Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy).
-Copyright (c) 2005 - 2009 CACE Technologies, Davis (California).
+Copyright (c) 2005 - 2010 CACE Technologies, Davis (California).
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
diff --git a/mswin32/winpcap/npf.sys b/mswin32/winpcap/npf.sys
index daebc52ace..f256f4cb89 100644
Binary files a/mswin32/winpcap/npf.sys and b/mswin32/winpcap/npf.sys differ
diff --git a/mswin32/winpcap/nt5/x64/Packet.dll b/mswin32/winpcap/nt5/x64/Packet.dll
index f165b30a0b..1a991b438d 100755
Binary files a/mswin32/winpcap/nt5/x64/Packet.dll and b/mswin32/winpcap/nt5/x64/Packet.dll differ
diff --git a/mswin32/winpcap/nt5/x86/Packet.dll b/mswin32/winpcap/nt5/x86/Packet.dll
index 7975174c4f..ed3b2f79dc 100755
Binary files a/mswin32/winpcap/nt5/x86/Packet.dll and b/mswin32/winpcap/nt5/x86/Packet.dll differ
diff --git a/mswin32/winpcap/rpcapd.exe b/mswin32/winpcap/rpcapd.exe
index a90ff6ed9e..3857a62ab6 100755
Binary files a/mswin32/winpcap/rpcapd.exe and b/mswin32/winpcap/rpcapd.exe differ
diff --git a/mswin32/winpcap/vista/x64/Packet.dll b/mswin32/winpcap/vista/x64/Packet.dll
index e1e1f8dc4e..aa54b5e372 100755
Binary files a/mswin32/winpcap/vista/x64/Packet.dll and b/mswin32/winpcap/vista/x64/Packet.dll differ
diff --git a/mswin32/winpcap/vista/x86/Packet.dll b/mswin32/winpcap/vista/x86/Packet.dll
index a0d04c5ae6..9d21036e96 100755
Binary files a/mswin32/winpcap/vista/x86/Packet.dll and b/mswin32/winpcap/vista/x86/Packet.dll differ
diff --git a/mswin32/winpcap/winpcap-nmap.nsi b/mswin32/winpcap/winpcap-nmap.nsi
index 4f16ee0f04..1aef4328f1 100644
--- a/mswin32/winpcap/winpcap-nmap.nsi
+++ b/mswin32/winpcap/winpcap-nmap.nsi
@@ -12,6 +12,7 @@
 
 ;; Rob Nicholls
 ;; Updated to 4.1.1, October 2009
+;; Updated to 4.1.2, July 2010
 
 SetCompressor /SOLID /FINAL lzma
 
@@ -25,10 +26,10 @@ SetCompressor /SOLID /FINAL lzma
 ;General
 
 ; The name of the installer
-Name "WinPcap (Nmap) 4.1.1"
+Name "WinPcap (Nmap) 4.1.2"
 
 ; The file to write
-OutFile "winpcap-nmap-4.11.exe"
+OutFile "winpcap-nmap-4.12.exe"
 
 RequestExecutionLevel admin
 
@@ -42,10 +43,10 @@ Function un.is64bit
   System::Call "kernel32::IsWow64Process(i s, *i .r0)"
 FunctionEnd
 
-VIProductVersion "4.1.0.1753"
-VIAddVersionKey /LANG=1033 "FileVersion" "4.1.0.1753"
+VIProductVersion "4.1.0.2001"
+VIAddVersionKey /LANG=1033 "FileVersion" "4.1.0.2001"
 VIAddVersionKey /LANG=1033 "ProductName" "WinPcap"
-VIAddVersionKey /LANG=1033 "FileDescription" "WinPcap 4.1.1 installer"
+VIAddVersionKey /LANG=1033 "FileDescription" "WinPcap 4.1.2 installer"
 VIAddVersionKey /LANG=1033 "LegalCopyright" ""
 
 ;--------------------------------
@@ -130,7 +131,7 @@ Function .onInit
   var /GLOBAL inst_ver
   var /GLOBAL my_ver
   var /GLOBAL npf_startup
-  StrCpy $my_ver "4.1.0.1753"
+  StrCpy $my_ver "4.1.0.2001"
   StrCpy $npf_startup "YES"
 
   ; Always use the requested /D= $INSTDIR if given.
@@ -453,8 +454,8 @@ Section "WinPcap" SecWinPcap
 
     ; Write the rest of the uninstall keys for Windows
 
-    WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\WinPcapInst" "DisplayName" "WinPcap 4.1.1"
-    WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\WinPcapInst" "DisplayVersion" "4.1.0.1753"
+    WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\WinPcapInst" "DisplayName" "WinPcap 4.1.2"
+    WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\WinPcapInst" "DisplayVersion" "4.1.0.2001"
     WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\WinPcapInst" "Publisher" "CACE Technologies"
     WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\WinPcapInst" "URLInfoAbout" "http://www.cacetech.com"
     WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\WinPcapInst" "URLUpdateInfo" "http://www.winpcap.org"
diff --git a/mswin32/winpcap/wpcap.dll b/mswin32/winpcap/wpcap.dll
index 2babd78da4..ebb17ad55c 100644
Binary files a/mswin32/winpcap/wpcap.dll and b/mswin32/winpcap/wpcap.dll differ
diff --git a/mswin32/winpcap/x64/npf.sys b/mswin32/winpcap/x64/npf.sys
index fbc71bcb76..3e373fa6c9 100644
Binary files a/mswin32/winpcap/x64/npf.sys and b/mswin32/winpcap/x64/npf.sys differ
diff --git a/mswin32/winpcap/x64/wpcap.dll b/mswin32/winpcap/x64/wpcap.dll
index ecaa08944f..d68e476e41 100755
Binary files a/mswin32/winpcap/x64/wpcap.dll and b/mswin32/winpcap/x64/wpcap.dll differ