diff --git a/components/platform/file.posix.cpp b/components/platform/file.posix.cpp
index b6c322de11..dd50083e7a 100644
--- a/components/platform/file.posix.cpp
+++ b/components/platform/file.posix.cpp
@@ -8,6 +8,8 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <string.h>
+#include <stdexcept>
+#include <string>
 
 namespace Platform::File {
 
@@ -29,7 +31,6 @@ namespace Platform::File {
 
     Handle open(const char* filename)
     {
-        // Posix
 #ifdef O_BINARY
         static const int openFlags = O_RDONLY | O_BINARY;
 #else
@@ -39,9 +40,7 @@ namespace Platform::File {
         auto handle = ::open(filename, openFlags, 0);
         if (handle == -1)
         {
-            std::ostringstream os;
-            os << "Failed to open '" << filename << "' for reading: " << strerror(errno);
-            throw std::runtime_error(os.str());
+            throw std::runtime_error(std::string("Failed to open '") + filename + "' for reading: " + strerror(errno));
         }
         return static_cast<Handle>(handle);
     }
@@ -58,7 +57,7 @@ namespace Platform::File {
         const auto nativeHandle = getNativeHandle(handle);
         const auto nativeSeekType = getNativeSeekType(type);
 
-        if (::lseek(toNativeHandle(mHandle), position, SEEK_SET) == -1)
+        if (::lseek(nativeHandle, position, nativeSeekType) == -1)
         {
             throw std::runtime_error("An lseek() call failed: " + std::string(strerror(errno)));
         }
@@ -66,14 +65,14 @@ namespace Platform::File {
 
     size_t size(Handle handle)
     {
-        auto nativeHandle = getNativeHandle(handle);
-
-        auto oldPos = tell(handle);
+        const auto oldPos = tell(handle);
 
         seek(handle, 0, SeekType::End);
-        auto size = tell(handle);
+        const auto fileSize = tell(handle);
+        seek(handle, oldPos, SeekType::Begin);
 
-        return static_cast<size_t>(size);
+
+        return static_cast<size_t>(fileSize);
     }
 
     size_t tell(Handle handle)
@@ -92,7 +91,7 @@ namespace Platform::File {
     {
         auto nativeHandle = getNativeHandle(handle);
 
-        int amount = ::read(toNativeHandle(mHandle), data, size);
+        int amount = ::read(nativeHandle, data, size);
         if (amount == -1)
         {
             throw std::runtime_error("An attempt to read " + std::to_string(size) + " bytes failed: " + strerror(errno));
diff --git a/components/platform/file.stdio.cpp b/components/platform/file.stdio.cpp
index dd2660cd32..ed17bd2040 100644
--- a/components/platform/file.stdio.cpp
+++ b/components/platform/file.stdio.cpp
@@ -5,6 +5,8 @@
 
 #include <errno.h>
 #include <string.h>
+#include <string>
+#include <stdexcept>
 
 namespace Platform::File {
 
@@ -26,13 +28,10 @@ namespace Platform::File {
 
     Handle open(const char* filename)
     {
-        // Stdio
         FILE* handle = fopen(filename, "rb");
         if (handle == nullptr)
         {
-            std::ostringstream os;
-            os << "Failed to open '" << filename << "' for reading: " << strerror(errno);
-            throw std::runtime_error(os.str());
+            throw std::runtime_error(std::string("Failed to open '") + filename + "' for reading: " + strerror(errno));
         }
         return static_cast<Handle>(reinterpret_cast<intptr_t>(handle));
     }
@@ -49,19 +48,20 @@ namespace Platform::File {
         const auto nativeSeekType = getNativeSeekType(type);
         if (fseek(nativeHandle, position, nativeSeekType) != 0)
         {
-            throw std::runtime_error("An fseek() call failed: " + std::string(strerror(errno)));
+            throw std::runtime_error(std::string("An fseek() call failed: ") + strerror(errno));
         }
     }
 
     size_t size(Handle handle)
     {
         auto nativeHandle = getNativeHandle(handle);
-        auto oldPos = tell(handle);
-
+        
+        const auto oldPos = tell(handle);
         seek(handle, 0, SeekType::End);
-        auto size = tell(handle);
+        const auto fileSize = tell(handle);
+        seek(handle, oldPos, SeekType::Begin);
 
-        return static_cast<size_t>(size);
+        return static_cast<size_t>(fileSize);
     }
 
     size_t tell(Handle handle)
@@ -71,7 +71,7 @@ namespace Platform::File {
         long position = ftell(nativeHandle);
         if (position == -1)
         {
-            throw std::runtime_error("An ftell() call failed: " + std::string(strerror(errno)));
+            throw std::runtime_error(std::string("An ftell() call failed: ") + strerror(errno));
         }
         return static_cast<size_t>(position);
     }
@@ -83,7 +83,7 @@ namespace Platform::File {
         int amount = fread(data, 1, size, nativeHandle);
         if (amount == 0 && ferror(nativeHandle))
         {
-            throw std::runtime_error("An attempt to read " + std::to_string(size) + " bytes failed: " + strerror(errno));
+            throw std::runtime_error(std::string("An attempt to read ") + std::to_string(size) + " bytes failed: " + strerror(errno));
         }
         return static_cast<size_t>(amount);
     }
diff --git a/components/platform/file.win32.cpp b/components/platform/file.win32.cpp
index 59601caa80..31fe67ecba 100644
--- a/components/platform/file.win32.cpp
+++ b/components/platform/file.win32.cpp
@@ -5,6 +5,7 @@
 
 #include <components/windows.hpp>
 #include <string>
+#include <stdexcept>
 #include <boost/locale.hpp>
 
 namespace Platform::File {
@@ -31,9 +32,7 @@ namespace Platform::File {
         HANDLE handle = CreateFileW(wname.c_str(), GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
         if (handle == INVALID_HANDLE_VALUE)
         {
-            std::ostringstream os;
-            os << "Failed to open '" << filename << "' for reading: " << GetLastError();
-            throw std::runtime_error(os.str());
+            throw std::runtime_error(std::string("Failed to open '") + filename + "' for reading: " + std::to_string(GetLastError()));
         }
         return static_cast<Handle>(reinterpret_cast<intptr_t>(handle));
     }
@@ -53,7 +52,7 @@ namespace Platform::File {
         {
             if (auto errCode = GetLastError(); errCode != ERROR_SUCCESS)
             {
-                throw std::runtime_error("An fseek() call failed: " + std::to_string(errCode));
+                throw std::runtime_error(std::string("An fseek() call failed: ") + std::to_string(errCode));
             }
         }
     }
@@ -93,7 +92,7 @@ namespace Platform::File {
         DWORD bytesRead{};
 
         if (!ReadFile(nativeHandle, data, static_cast<DWORD>(size), &bytesRead, nullptr))
-            throw std::runtime_error("A read operation on a file failed: " + std::to_string(GetLastError()));
+            throw std::runtime_error(std::string("A read operation on a file failed: ") + std::to_string(GetLastError()));
 
         return bytesRead;
     }