diff --git a/Common/StringUtil.cpp b/Common/StringUtil.cpp
index a476524e34..5dae0a5d7f 100644
--- a/Common/StringUtil.cpp
+++ b/Common/StringUtil.cpp
@@ -139,15 +139,12 @@ bool TryParse(const std::string &str, u32 *const output)
 
 	if (ULONG_MAX > UINT_MAX) {
 #ifdef _MSC_VER
-#pragma warning disable(4309);
+#pragma warning (disable:4309)
 #endif
 		// Note: The typecasts avoid GCC warnings when long is 32 bits wide.
 		if (value >= static_cast<unsigned long>(0x100000000ull)
 				&& value <= static_cast<unsigned long>(0xFFFFFFFF00000000ull))
 			return false;
-#ifdef _MSC_VER
-#pragma warning enable(4309);
-#endif
 	}
 
 	*output = static_cast<u32>(value);
diff --git a/Core/HLE/sceKernelThread.cpp b/Core/HLE/sceKernelThread.cpp
index 00c2f72712..5512e6c1d6 100644
--- a/Core/HLE/sceKernelThread.cpp
+++ b/Core/HLE/sceKernelThread.cpp
@@ -544,7 +544,7 @@ void __KernelScheduleWakeup(SceUID threadID, int usFromNow)
 
 void __KernelRemoveFromThreadQueue(Thread *t)
 {
-  for (int i = 0; i < threadqueue.size(); i++)
+  for (size_t i = 0; i < threadqueue.size(); i++)
   {
     if (threadqueue[i] == t)
     {
@@ -628,7 +628,7 @@ void sceKernelCheckThreadStack()
 {
   u32 error;
   Thread *t = kernelObjects.Get<Thread>(__KernelGetCurThread(), error);
-  u32 diff = abs((s64)t->stackBlock - (s64)currentMIPS->r[MIPS_REG_SP]);
+  u32 diff = (u32)abs((s64)t->stackBlock - (s64)currentMIPS->r[MIPS_REG_SP]);
   ERROR_LOG(HLE, "%i=sceKernelCheckThreadStack()", diff);
 	RETURN(diff); //Blatant lie
 }
diff --git a/Core/MIPS/MIPSIntVFPU.cpp b/Core/MIPS/MIPSIntVFPU.cpp
index cf24cd4a1d..93852daa9b 100644
--- a/Core/MIPS/MIPSIntVFPU.cpp
+++ b/Core/MIPS/MIPSIntVFPU.cpp
@@ -826,7 +826,7 @@ namespace MIPSInt
     {
       switch ((op >> 16) & 0x1f)
       {
-      case 1: d[i] = currentMIPS->rng.R32(); break;  // vrndi - TODO: copy bits instead?
+      case 1: d[i] = (float)currentMIPS->rng.R32(); break;  // vrndi - TODO: copy bits instead?
       case 2: d[i] = 1.0f + ((float)currentMIPS->rng.R32() / 0xFFFFFFFF); break; // vrndf1   TODO: make more accurate
       case 3: d[i] = 2.0f + 2 * ((float)currentMIPS->rng.R32() / 0xFFFFFFFF); break; // vrndf2   TODO: make more accurate
       case 4: d[i] = 0.0f;  // Should not get here