diff --git a/.gitignore b/.gitignore
index 7b805b711c8..ecd443b8b59 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,12 +3,14 @@ icu4c/bin
 icu4c/bin32uwp
 icu4c/bin64
 icu4c/bin64uwp
+icu4c/binARMUWP
 icu4c/commondata
 icu4c/include
 icu4c/lib
 icu4c/lib32uwp
 icu4c/lib64
 icu4c/lib64uwp
+icu4c/libARMuwp
 icu4c/source/Doxyfile
 icu4c/source/Makefile
 icu4c/source/README
@@ -34,6 +36,7 @@ icu4c/source/common/Generated[!!-~]Files
 icu4c/source/common/Makefile
 icu4c/source/common/Makefile.local
 icu4c/source/common/Release
+icu4c/source/common/arm
 icu4c/source/common/common.res
 icu4c/source/common/common.vcproj.*.*.user
 icu4c/source/common/debug
@@ -114,6 +117,7 @@ icu4c/source/i18n/Generated[!!-~]Files
 icu4c/source/i18n/Makefile
 icu4c/source/i18n/Makefile.local
 icu4c/source/i18n/Release
+icu4c/source/i18n/arm
 icu4c/source/i18n/debug
 icu4c/source/i18n/i18n.res
 icu4c/source/i18n/i18n.vcproj.*.*.user
diff --git a/icu4c/source/tools/genrb/genrb.vcxproj b/icu4c/source/tools/genrb/genrb.vcxproj
index 56d2bfdae5a..8f8180861ce 100644
--- a/icu4c/source/tools/genrb/genrb.vcxproj
+++ b/icu4c/source/tools/genrb/genrb.vcxproj
@@ -105,7 +105,7 @@
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <CompileAs>Default</CompileAs>
       <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <ResourceCompile>
@@ -149,7 +149,7 @@
       <DebugInformationFormat>EditAndContinue</DebugInformationFormat>
       <CompileAs>Default</CompileAs>
       <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <ResourceCompile>
@@ -191,7 +191,7 @@
       <SuppressStartupBanner>true</SuppressStartupBanner>
       <CompileAs>Default</CompileAs>
       <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <ResourceCompile>
@@ -234,7 +234,7 @@
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <CompileAs>Default</CompileAs>
       <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
-      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WINVER=0x0601;_WIN32_WINNT=0x0601;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
     </ClCompile>
     <ResourceCompile>