diff --git a/cmake/CompilerFlags.cmake b/cmake/CompilerFlags.cmake
index 887923a..256f730 100644
--- a/cmake/CompilerFlags.cmake
+++ b/cmake/CompilerFlags.cmake
@@ -13,5 +13,6 @@
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 	include(CompilerFlags-GNU)
 else()
-	message(FATAL_ERROR "Unsupported (for now?) compiler ${CMAKE_CXX_COMPILER_ID}")
+	message(WARNING "Unsupported (for now?) compiler ${CMAKE_CXX_COMPILER_ID}. Configuration will continue,"
+				    "however this configuration may break at any time.")
 endif()
diff --git a/include/europa/structs/Pak.hpp b/include/europa/structs/Pak.hpp
index f216148..33d4833 100644
--- a/include/europa/structs/Pak.hpp
+++ b/include/europa/structs/Pak.hpp
@@ -25,6 +25,11 @@ namespace europa::structs {
 		Ver5 = 0x5
 	};
 
+	
+#ifdef _MSC_VER
+	#pragma pack(push, 1)
+#endif
+
 	struct [[gnu::packed]] PakHeader_Common {
 		char magic[16]; // "Europa Packfile\0"
 
@@ -99,6 +104,7 @@ namespace europa::structs {
 		u32 reservedPad {};
 	};
 
+
 	struct [[gnu::packed]] PakHeader_V4 : public PakHeader_Impl<PakHeader_V4, PakVersion::Ver4> {
 		using PakHeader_Impl<PakHeader_V4, PakVersion::Ver4>::PakHeader_Impl;
 
@@ -162,6 +168,11 @@ namespace europa::structs {
 		u8 pad2;
 	};
 
+	
+#ifdef _MSC_VER
+	#pragma pack(pop)
+#endif
+
 	using PakHeaderVariant = std::variant<
 	structs::PakHeader_V3,
 	structs::PakHeader_V4,
diff --git a/include/europa/structs/Yatf.hpp b/include/europa/structs/Yatf.hpp
index 598b485..a6beaae 100644
--- a/include/europa/structs/Yatf.hpp
+++ b/include/europa/structs/Yatf.hpp
@@ -15,6 +15,10 @@
 
 namespace europa::structs {
 
+#ifdef _MSC_VER
+	#pragma pack(push, 1)
+#endif
+
 	struct [[gnu::packed]] YatfHeader {
 		enum class TextureFormat : u8 {
 			// V1 formats.
@@ -52,6 +56,10 @@ namespace europa::structs {
 		}
 	};
 
+#ifdef _MSC_VER
+	#pragma pack(pop)
+#endif
+
 } // namespace europa::structs
 
 #endif // EUROPA_STRUCTS_YATF_H
diff --git a/src/libeuropa/io/pak/Writer.cpp b/src/libeuropa/io/pak/Writer.cpp
index ea71382..3268b73 100644
--- a/src/libeuropa/io/pak/Writer.cpp
+++ b/src/libeuropa/io/pak/Writer.cpp
@@ -86,14 +86,14 @@ namespace europa::io::pak {
 
 			// Update the offset to where we currently are, since we will be writing the file there
 			file.VisitTocEntry([&](auto& tocEntry) {
-				tocEntry.offset = os.tellp();
+				tocEntry.offset = static_cast<std::uint32_t>(os.tellp());
 			});
 
 			// For sector alignment.
 			if constexpr(THeader::VERSION == structs::PakVersion::Ver5) {
 				if(sectorAlignment == SectorAlignment::Align) {
 					auto& toc = file.GetTOCEntry<structs::PakHeader_V5::TocEntry_SectorAligned>();
-					toc.startLBA = (os.tellp() / util::kCDSectorSize);
+					toc.startLBA = static_cast<std::uint32_t>((os.tellp() / util::kCDSectorSize));
 				}
 			}
 
@@ -132,7 +132,7 @@ namespace europa::io::pak {
 						   filename });
 		}
 
-		pakHeader.tocOffset = os.tellp();
+		pakHeader.tocOffset = static_cast<std::uint32_t>(os.tellp());
 
 		sink.OnEvent({ WriterProgressReportSink::PakEvent::EventCode::WritingToc });
 
@@ -156,7 +156,7 @@ namespace europa::io::pak {
 		sink.OnEvent({ WriterProgressReportSink::PakEvent::EventCode::FillInHeader });
 
 		// Fill out the rest of the header.
-		pakHeader.fileCount = sortedFiles.size();
+		pakHeader.fileCount = static_cast<std::uint32_t>(sortedFiles.size());
 		pakHeader.tocSize = static_cast<std::uint32_t>(os.tellp()) - (pakHeader.tocOffset - 1);
 
 		// Timestamp.
diff --git a/src/tools/eupak/CreateCommand.cpp b/src/tools/eupak/CreateCommand.cpp
index 23057f8..3d0f9ed 100644
--- a/src/tools/eupak/CreateCommand.cpp
+++ b/src/tools/eupak/CreateCommand.cpp
@@ -246,10 +246,15 @@ namespace eupak {
 
 				// Setup other stuff like modtime
 				file.VisitTocEntry([&](auto& tocEntry) {
+#ifdef _WIN32
+					auto seconds = std::chrono::time_point_cast<std::chrono::seconds>(lastModified);
+					tocEntry.creationUnixTime = static_cast<std::uint32_t>(seconds.time_since_epoch().count());
+#else
 					// Kinda stupid but works
 					auto sys = std::chrono::file_clock::to_sys(lastModified);
 					auto seconds = std::chrono::time_point_cast<std::chrono::seconds>(sys);
 					tocEntry.creationUnixTime = static_cast<std::uint32_t>(seconds.time_since_epoch().count());
+#endif
 				});
 
 				files.emplace_back(std::make_pair(relativePathName, std::move(file)));
diff --git a/src/tools/eupak/Utils.cpp b/src/tools/eupak/Utils.cpp
index d786ca6..7c644ca 100644
--- a/src/tools/eupak/Utils.cpp
+++ b/src/tools/eupak/Utils.cpp
@@ -48,7 +48,15 @@ namespace eupak {
 		char buf[1024]{};
 		tm tmObject{};
 
+#ifdef _MSC_VER
+		// All I will choose to say is: Why didn't Microsoft
+		// just implement _r versions. This is nearly exactly
+		// the same as those! ... This is why I hate cross-platform
+		// software development sometimes
+		localtime_s(&tmObject, &time);
+#else
 		localtime_r(&time, &tmObject);
+#endif
 
 		auto count = std::strftime(&buf[0], sizeof(buf), format.data(), &tmObject);