diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0cb887022e..c5f4de9f88 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -114,8 +114,8 @@ else()
 endif()
 
 if(MSVC)
-    add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-    add_definitions(-D_SCL_SECURE_NO_WARNINGS)
+    add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
+    add_definitions(-D_SCL_SECURE_NO_DEPRECATE)
 endif(MSVC)
 
 #TODO: Make the OpenSSL includes less promiscuous so this isn't needed
diff --git a/Sources/Plasma/CoreLib/plFileSystem.h b/Sources/Plasma/CoreLib/plFileSystem.h
index 1d3a2ce9f5..07f3d7679b 100644
--- a/Sources/Plasma/CoreLib/plFileSystem.h
+++ b/Sources/Plasma/CoreLib/plFileSystem.h
@@ -259,10 +259,10 @@ class plFileInfo
     uint64_t ModifyTime() const { return fModifyTime; }
 
     /** Returns \p true if this file is a directory. */
-    bool IsDirectory() const { return (fFlags & kIsDirectory); }
+    bool IsDirectory() const { return (fFlags & kIsDirectory) != 0; }
 
     /** Returns \p true if this file is a regular file. */
-    bool IsFile() const { return (fFlags & kIsNormalFile); }
+    bool IsFile() const { return (fFlags & kIsNormalFile) != 0; }
 
 private:
     plFileName fName;
diff --git a/Sources/Plasma/CoreLib/plString.h b/Sources/Plasma/CoreLib/plString.h
index daa7bd90cc..f0f30fbbce 100644
--- a/Sources/Plasma/CoreLib/plString.h
+++ b/Sources/Plasma/CoreLib/plString.h
@@ -66,6 +66,8 @@ typedef unsigned int UniChar;
 #    define wcsicmp     _wcsicmp
 #    define wcsnicmp    _wcsnicmp
 #    define strlwr      _strlwr
+#    define strdup      _strdup
+#    define wcsdup      _wcsdup
 #else
 #    define stricmp     strcasecmp
 #    define strnicmp    strncasecmp
diff --git a/Sources/Plasma/NucleusLib/pnAsyncCoreExe/Private/Win32/pnAceW32Dns.cpp b/Sources/Plasma/NucleusLib/pnAsyncCoreExe/Private/Win32/pnAceW32Dns.cpp
index ab63ae8860..ce0a902793 100644
--- a/Sources/Plasma/NucleusLib/pnAsyncCoreExe/Private/Win32/pnAceW32Dns.cpp
+++ b/Sources/Plasma/NucleusLib/pnAsyncCoreExe/Private/Win32/pnAceW32Dns.cpp
@@ -273,11 +273,12 @@ void AsyncAddressLookupName (
 
     // Get name/port
     char* ansiName = strdup(name);
-    if (char* portStr = StrChr(ansiName, ':')) {
-        if (unsigned newPort = StrToUnsigned(portStr + 1, nil, 10))
+    if (char* portStr = strchr(ansiName, ':')) {
+        if (unsigned long newPort = strtoul(portStr + 1, nullptr, 10))
             port = newPort;
         *portStr = 0;
     }
+    free(ansiName);
 
     // Initialize lookup
     Lookup * lookup         = new Lookup;
diff --git a/Sources/Plasma/PubUtilLib/plPipeline/hsG3DDeviceSelector.cpp b/Sources/Plasma/PubUtilLib/plPipeline/hsG3DDeviceSelector.cpp
index 2c8495a29b..dfedf4662e 100644
--- a/Sources/Plasma/PubUtilLib/plPipeline/hsG3DDeviceSelector.cpp
+++ b/Sources/Plasma/PubUtilLib/plPipeline/hsG3DDeviceSelector.cpp
@@ -313,8 +313,6 @@ void hsG3DDeviceSelector::RemoveUnusableDevModes(bool bTough)
         }
         else if (fRecords[i].GetG3DDeviceType() == hsG3DDeviceSelector::kDevTypeDirect3D)
         {
-            uint32_t      totalMem;  
-
             // Remove software Direct3D devices
             if ((fRecords[i].GetG3DHALorHEL() != hsG3DDeviceSelector::kHHD3DHALDev) &&
                 (fRecords[i].GetG3DHALorHEL() != hsG3DDeviceSelector::kHHD3DTnLHalDev))