diff --git a/aegilib/aegilib.vcproj b/aegilib/aegilib.vcproj
index 4285eff65..54651895f 100644
--- a/aegilib/aegilib.vcproj
+++ b/aegilib/aegilib.vcproj
@@ -53,6 +53,7 @@
 				DebugInformationFormat="4"
 				DisableSpecificWarnings="4996"
 				ForcedIncludeFiles="prec.h"
+				EnablePREfast="false"
 			/>
 			<Tool
 				Name="VCManagedResourceCompilerTool"
diff --git a/aegilib/src/formats/format_ass.cpp b/aegilib/src/formats/format_ass.cpp
index 83e8780c2..604b639ab 100644
--- a/aegilib/src/formats/format_ass.cpp
+++ b/aegilib/src/formats/format_ass.cpp
@@ -342,8 +342,8 @@ void FormatHandlerASS::WriteSection(TextFileWriter &writer,SectionPtr section)
 	// Write properties
 	size_t props = section->GetPropertyCount();
 	for (size_t i=0;i<props;i++) {
-		String name = section->GetPropertyName(i);
-		writer.WriteLineToFile(name + _T(": ") + section->GetProperty(name));
+		String propName = section->GetPropertyName(i);
+		writer.WriteLineToFile(propName + _T(": ") + section->GetProperty(name));
 	}
 
 	// Write contents
diff --git a/aegilib/src/formats/format_ass.h b/aegilib/src/formats/format_ass.h
index b329d0cb8..929188d32 100644
--- a/aegilib/src/formats/format_ass.h
+++ b/aegilib/src/formats/format_ass.h
@@ -39,6 +39,7 @@
 #include "section.h"
 #include "section_entry_dialogue.h"
 #include "section_entry_style.h"
+#include "tr1.h"
 
 namespace Aegilib {
 
@@ -119,7 +120,7 @@ namespace Aegilib {
 		String effect;
 		String actor;
 		Time start,end;
-		int margin[4];
+		array<int,4> margin;
 		int layer;
 		bool isComment;
 
@@ -143,7 +144,7 @@ namespace Aegilib {
 		Time GetEndTime() const { return end; }
 		bool IsComment() const { return isComment; }
 		int GetLayer() const { return layer; }
-		int GetMargin(int n) const { return margin[n]; }
+		int GetMargin(int n) const { return margin.at(n); }
 		const String& GetStyle() const { return style; }
 		const String& GetActor() const { return actor; }
 		const String& GetUserField() const { return effect; }
@@ -154,7 +155,7 @@ namespace Aegilib {
 		void SetEndTime(Time setEnd) { end = setEnd; }
 		void SetComment(bool _isComment) { isComment = _isComment; }
 		void SetLayer(int _layer) { layer = _layer; }
-		void SetMargin(int _margin,int value) { margin[_margin] = value; }
+		void SetMargin(int _margin,int value) { margin.at(_margin) = value; }
 		void SetStyle(const String &_style) { style = _style; }
 		void SetUserField(const String &userField) { effect = userField; }
 	};
@@ -166,8 +167,8 @@ namespace Aegilib {
 		String font;
 		float fontSize;
 
-		Colour colour[5];	// 0 = Primary, 1 = Secondary, 2 = Tertiary, 3 = Outline, 4 = Shadow
-		int margin[4];
+		array<Colour,5> colour;	// 0 = Primary, 1 = Secondary, 2 = Tertiary, 3 = Outline, 4 = Shadow
+		array<int,4> margin;
 
 		bool bold;
 		bool italic;
@@ -200,8 +201,8 @@ namespace Aegilib {
 		String GetName() const { return name; }
 		String GetFontName() const { return font; }
 		float GetFontSize() const { return fontSize; }
-		Colour GetColour(int n) const { return colour[n]; }
-		int GetMargin(int n) const { return margin[n]; }
+		Colour GetColour(int n) const { return colour.at(n); }
+		int GetMargin(int n) const { return margin.at(n); }
 	};
 
 };
diff --git a/aegilib/src/text_file_reader.cpp b/aegilib/src/text_file_reader.cpp
index f843ef54a..a9fc44b6a 100644
--- a/aegilib/src/text_file_reader.cpp
+++ b/aegilib/src/text_file_reader.cpp
@@ -74,7 +74,7 @@ void TextFileReader::SetEncodingConfiguration() {
 	// Set encoding configuration
 	swap = false;
 	Is16 = false;
-	conv = shared_ptr<wxMBConv>();
+	//conv = shared_ptr<wxMBConv>();
 	if (encoding == _T("UTF-8")) {
 		conv = shared_ptr<wxMBConv> (new wxMBConvUTF8);
 	}
diff --git a/aegilib/src/version.cpp b/aegilib/src/version.cpp
index aebaa5f3f..924bcad88 100644
--- a/aegilib/src/version.cpp
+++ b/aegilib/src/version.cpp
@@ -35,7 +35,7 @@
 
 
 #include "version.h"
-#include "tr1.h"
+#include "aegistring.h"
 using namespace Aegilib;
 
 
@@ -57,17 +57,17 @@ String Aegilib::GetLibraryURL()
 
 /////////////////////////
 // Host application data
-static shared_ptr<String> hostName;
-static shared_ptr<String> hostURL;
+static String* hostName = NULL;
+static String* hostURL = NULL;
 
 void Aegilib::SetHostApplicationName(const String name)
 {
-	if (!hostName) hostName = shared_ptr<String> (new String());
+	if (!hostName) hostName = new String();
 	*hostName = name;
 }
 void Aegilib::SetHostApplicationURL(const String url)
 {
-	if (!hostURL) hostName = shared_ptr<String> (new String());
+	if (!hostURL) hostURL = new String();
 	*hostURL = url;
 }
 String Aegilib::GetHostApplicationName()
diff --git a/aegisub/include/aegisub/audio_player.h b/aegisub/include/aegisub/audio_player.h
index f58d49347..96c606924 100644
--- a/aegisub/include/aegisub/audio_player.h
+++ b/aegisub/include/aegisub/audio_player.h
@@ -97,5 +97,6 @@ public:
 // Factory
 class AudioPlayerFactory {
 public:
+	virtual ~AudioPlayerFactory() {}
 	virtual AudioPlayer *CreatePlayer()=0;
 };
diff --git a/aegisub/include/aegisub/audio_provider.h b/aegisub/include/aegisub/audio_provider.h
index 98fa820dc..2dcf3cacd 100644
--- a/aegisub/include/aegisub/audio_provider.h
+++ b/aegisub/include/aegisub/audio_provider.h
@@ -83,5 +83,6 @@ public:
 // Factory
 class AudioProviderFactory {
 public:
+	virtual ~AudioProviderFactory() {}
 	virtual AudioProvider *CreateProvider(Aegisub::String filename)=0;
 };
diff --git a/aegisub/include/aegisub/spellchecker.h b/aegisub/include/aegisub/spellchecker.h
index 845218641..205514315 100644
--- a/aegisub/include/aegisub/spellchecker.h
+++ b/aegisub/include/aegisub/spellchecker.h
@@ -64,5 +64,6 @@ public:
 // Factory
 class SpellCheckerFactory {
 public:
+	virtual ~SpellCheckerFactory() {}
 	virtual SpellChecker *CreateSpellChecker()=0;
 };
diff --git a/aegisub/include/aegisub/video_provider.h b/aegisub/include/aegisub/video_provider.h
index b7f66ad3f..cd78ba604 100644
--- a/aegisub/include/aegisub/video_provider.h
+++ b/aegisub/include/aegisub/video_provider.h
@@ -87,5 +87,6 @@ public:
 // Factory
 class VideoProviderFactory {
 public:
+	virtual ~VideoProviderFactory() {}
 	virtual VideoProvider *CreateProvider(Aegisub::String video,double fps=0.0)=0;
 };