diff --git a/Library/Litestep.cpp b/Library/Litestep.cpp
index 72bae8a1..23827fa6 100644
--- a/Library/Litestep.cpp
+++ b/Library/Litestep.cpp
@@ -505,15 +505,11 @@ BOOL LSLog(int nLevel, LPCTSTR pszModule, LPCTSTR pszMessage)
 	logInfo.message = pszMessage;
 
 	// Add timestamp
-	static DWORD startTime = 0;
+	static ULONGLONG startTime = CSystem::GetTickCount64();
+	ULONGLONG time = CSystem::GetTickCount64();
 
-	DWORD time = GetTickCount();
-	if (startTime == 0)
-	{
-		startTime = time;
-	}
 	WCHAR buffer[128];
-	_snwprintf_s(buffer, _TRUNCATE, L"(%02i:%02i:%02i.%03i) ", (time - startTime) / (1000 * 60* 60), ((time - startTime) / (1000 * 60)) % 60, ((time - startTime) / 1000) % 60, (time - startTime) % 1000);
+	_snwprintf_s(buffer, _TRUNCATE, L"(%02llu:%02llu:%02llu.%03llu) ", (time - startTime) / (1000 * 60* 60), ((time - startTime) / (1000 * 60)) % 60, ((time - startTime) / 1000) % 60, (time - startTime) % 1000);
 
 	std::wstring message(buffer);
 	logInfo.timestamp = message;
diff --git a/Library/MeasureUptime.cpp b/Library/MeasureUptime.cpp
index 7ebd3471..fde30e82 100644
--- a/Library/MeasureUptime.cpp
+++ b/Library/MeasureUptime.cpp
@@ -19,6 +19,7 @@
 #include "StdAfx.h"
 #include "MeasureUptime.h"
 #include "Rainmeter.h"
+#include "System.h"
 
 /*
 ** CMeasureUptime
@@ -73,8 +74,8 @@ bool CMeasureUptime::Update()
 {
 	if (!CMeasure::PreUpdate()) return false;
 
-	DWORD ticks = GetTickCount();
-	m_Value = ticks / 1000;
+	ULONGLONG ticks = CSystem::GetTickCount64();
+	m_Value = (double)(__int64)(ticks / 1000);
 
 	return PostUpdate();
 }
diff --git a/Library/Meter.cpp b/Library/Meter.cpp
index 4eeed9b7..54756e34 100644
--- a/Library/Meter.cpp
+++ b/Library/Meter.cpp
@@ -803,7 +803,6 @@ bool CMeter::Draw(Graphics& graphics)
 
 	if (m_AntiAlias)
 	{
-		//graphics.SetInterpolationMode(InterpolationModeBicubic);  // Bicubic is not suitable for shrinking an image.
 		graphics.SetSmoothingMode(SmoothingModeHighQuality);
 		graphics.SetPixelOffsetMode(PixelOffsetModeHighQuality);
 	}
diff --git a/Library/MeterBitmap.cpp b/Library/MeterBitmap.cpp
index c42fb2c3..9708cad1 100644
--- a/Library/MeterBitmap.cpp
+++ b/Library/MeterBitmap.cpp
@@ -21,6 +21,7 @@
 #include "Measure.h"
 #include "Error.h"
 #include "Rainmeter.h"
+#include "System.h"
 
 using namespace Gdiplus;
 
@@ -252,7 +253,7 @@ bool CMeterBitmap::Update()
 			if ((int)(value * realFrames) != (int)(m_Value * realFrames))
 			{
 				m_TransitionStartValue = m_Value;
-				m_TransitionStartTicks = GetTickCount();
+				m_TransitionStartTicks = CSystem::GetTickCount64();
 			}
 			else
 			{
@@ -301,7 +302,6 @@ bool CMeterBitmap::Draw(Graphics& graphics)
 	int x = GetX();
 	int y = GetY();
 
-	DWORD diffTicks = GetTickCount() - m_TransitionStartTicks;
 	if (m_Extend)
 	{
 		int value = (int)m_Value;
@@ -362,20 +362,21 @@ bool CMeterBitmap::Draw(Graphics& graphics)
 			// If transition is ongoing the pick the correct frame
 			if (m_TransitionStartTicks > 0)
 			{
-				int range = ((value % realFrames) - ((int)transitionValue % realFrames)) * (m_TransitionFrameCount + 1);
+				int diffTicks = (int)(CSystem::GetTickCount64() - m_TransitionStartTicks);
+
+				int range = ((value % realFrames) - (transitionValue % realFrames)) * (m_TransitionFrameCount + 1);
 				if (range < 0)
 				{
 					range += m_FrameCount;
 				}
-				int frameAdjustment = 0;
-				frameAdjustment = range * diffTicks / ((m_TransitionFrameCount + 1) * m_MeterWindow->GetTransitionUpdate());
+				int frameAdjustment = range * diffTicks / ((m_TransitionFrameCount + 1) * m_MeterWindow->GetTransitionUpdate());
 				if (frameAdjustment > range)
 				{
 					m_TransitionStartTicks = 0;		// The transition is over. Draw with the real value.
 				}
 				else
 				{
-					frame = ((int)transitionValue % realFrames) * (m_TransitionFrameCount + 1);
+					frame = (transitionValue % realFrames) * (m_TransitionFrameCount + 1);
 					frame += frameAdjustment;
 					frame %= m_FrameCount;
 				}
@@ -430,7 +431,9 @@ bool CMeterBitmap::Draw(Graphics& graphics)
 		// If transition is ongoing the pick the correct frame
 		if (m_TransitionStartTicks > 0)
 		{
-			if ((int)diffTicks > ((m_TransitionFrameCount + 1) * m_MeterWindow->GetTransitionUpdate()))
+			int diffTicks = (int)(CSystem::GetTickCount64() - m_TransitionStartTicks);
+
+			if (diffTicks > ((m_TransitionFrameCount + 1) * m_MeterWindow->GetTransitionUpdate()))
 			{
 				m_TransitionStartTicks = 0;		// The transition is over. Draw with the real value.
 			}
diff --git a/Library/MeterBitmap.h b/Library/MeterBitmap.h
index 2541514f..22c7f7f1 100644
--- a/Library/MeterBitmap.h
+++ b/Library/MeterBitmap.h
@@ -50,7 +50,7 @@ private:
 	int m_Digits;
 	double m_Value;
 
-	DWORD m_TransitionStartTicks;
+	ULONGLONG m_TransitionStartTicks;
 	double m_TransitionStartValue;
 };
 
diff --git a/Library/MeterWindow.cpp b/Library/MeterWindow.cpp
index 08572bd7..27826b38 100644
--- a/Library/MeterWindow.cpp
+++ b/Library/MeterWindow.cpp
@@ -3050,13 +3050,13 @@ LRESULT CMeterWindow::OnTimer(UINT uMsg, WPARAM wParam, LPARAM lParam)
 	}
 	else if (wParam == FADETIMER)
 	{
-		DWORD ticks = GetTickCount();
+		ULONGLONG ticks = CSystem::GetTickCount64();
 		if (m_FadeStartTime == 0)
 		{
 			m_FadeStartTime = ticks;
 		}
 
-		if (ticks - m_FadeStartTime > (DWORD)m_FadeDuration)
+		if (ticks - m_FadeStartTime > (ULONGLONG)m_FadeDuration)
 		{
 			KillTimer(m_Window, FADETIMER);
 			m_FadeStartTime = 0;
@@ -3071,7 +3071,7 @@ LRESULT CMeterWindow::OnTimer(UINT uMsg, WPARAM wParam, LPARAM lParam)
 		}
 		else
 		{
-			double value = (ticks - m_FadeStartTime);
+			double value = (double)(__int64)(ticks - m_FadeStartTime);
 			value /= m_FadeDuration;
  			value *= m_FadeEndValue - m_FadeStartValue;
 			value += m_FadeStartValue;
diff --git a/Library/MeterWindow.h b/Library/MeterWindow.h
index de6062c5..73077e51 100644
--- a/Library/MeterWindow.h
+++ b/Library/MeterWindow.h
@@ -409,7 +409,7 @@ private:
 	BLURMODE m_BlurMode;						// The blur mode
 	HRGN m_BlurRegion;							// Handle to the blur region
 
-	DWORD m_FadeStartTime;
+	ULONGLONG m_FadeStartTime;
 	int m_FadeStartValue;
 	int m_FadeEndValue;
 	int m_TransparencyValue;
diff --git a/Library/Rainmeter.cpp b/Library/Rainmeter.cpp
index a9f852f3..e68ebd0c 100644
--- a/Library/Rainmeter.cpp
+++ b/Library/Rainmeter.cpp
@@ -3728,11 +3728,13 @@ void CRainmeter::ReadStats()
 */
 void CRainmeter::WriteStats(bool bForce)
 {
-	static DWORD lastWrite = 0;
+	static ULONGLONG lastWrite = 0;
 
-	if (bForce || (lastWrite + 1000 * 60 < GetTickCount()))
+	ULONGLONG ticks = CSystem::GetTickCount64();
+
+	if (bForce || (lastWrite + 1000 * 60 < ticks))
 	{
-		lastWrite = GetTickCount();
+		lastWrite = ticks;
 
 		// Write the date for statistics
 		WritePrivateProfileString(L"Statistics", L"Since", m_StatsDate.c_str(), m_StatsFile.c_str());
diff --git a/Library/System.cpp b/Library/System.cpp
index 412e0ef0..a6bb6b3d 100644
--- a/Library/System.cpp
+++ b/Library/System.cpp
@@ -951,6 +951,32 @@ OSPLATFORM CSystem::GetOSPlatform()
 	return c_Platform;
 }
 
+/*
+** GetTickCount64
+**
+** Retrieves the number of milliseconds that have elapsed since the system was started.
+** In XP, returns the predictive value due to the 32bit limitation.
+**
+*/
+ULONGLONG CSystem::GetTickCount64()
+{
+	typedef ULONGLONG (WINAPI * FPGETTICKCOUNT64)();
+	static FPGETTICKCOUNT64 c_GetTickCount64 = (FPGETTICKCOUNT64)GetProcAddress(GetModuleHandle(L"kernel32"), "GetTickCount64");
+
+	if (c_GetTickCount64)
+	{
+		return c_GetTickCount64();
+	}
+	else
+	{
+		static ULONGLONG lastTicks = 0;
+		ULONGLONG ticks = GetTickCount();
+		while (ticks < lastTicks) ticks += 0x100000000;
+		lastTicks = ticks;
+		return ticks;
+	}
+}
+
 /*
 ** RmLoadLibrary
 **
diff --git a/Library/System.h b/Library/System.h
index 6ed36cc6..0892d916 100644
--- a/Library/System.h
+++ b/Library/System.h
@@ -72,6 +72,7 @@ public:
 	static void PrepareHelperWindow(HWND WorkerW);
 
 	static OSPLATFORM GetOSPlatform();
+	static ULONGLONG GetTickCount64();
 
 	static HMODULE RmLoadLibrary(LPCWSTR lpLibFileName, DWORD* dwError = NULL, bool ignoreErrors = false);
 	static void ResetWorkingDirectory();