diff --git a/src/Lib/Timer.cpp b/src/Lib/Timer.cpp
index e07ff73d..39ae829b 100644
--- a/src/Lib/Timer.cpp
+++ b/src/Lib/Timer.cpp
@@ -1,42 +1,113 @@
 #include "Timer.h"
 
+#ifdef _WIN64
+#include "windows.h"
+#endif
+
 Lib::Timer::Timer()
 {
+#ifdef _WIN64
+	LARGE_INTEGER f;
+	QueryPerformanceFrequency(&f);
+	m_Frequency = f.QuadPart;
+#endif
 }
 
 void Lib::Timer::Start()
 {
+#ifdef _WIN64
+	LARGE_INTEGER c;
+	QueryPerformanceCounter(&c);
+	m_StartTime = c.QuadPart;
+	m_is_timer_paused = false;
+#endif
 }
 
 void Lib::Timer::Pause()
 {
+#ifdef _WIN64
+	LARGE_INTEGER c;
+	QueryPerformanceCounter(&c);
+	m_PauseTime = c.QuadPart;
+#endif
+	m_is_timer_paused = true;
 }
 
 void Lib::Timer::Resume()
 {
+	u64 current_time = 0;
+
+#ifdef _WIN64
+	LARGE_INTEGER c;
+	QueryPerformanceCounter(&c);
+	current_time = c.QuadPart;
+#endif
+
+	m_StartTime += current_time - m_PauseTime;
+	m_is_timer_paused = false;
 }
 
 bool Lib::Timer::IsPaused() const
 {
-	return false;
+	return m_is_timer_paused;
 }
 
 double Lib::Timer::GetTimeMsec() const
 {
-	return 0.0;
+	if (m_is_timer_paused)
+	{
+		return 1000.0 * (static_cast<double>(m_PauseTime - m_StartTime)) / static_cast<double>(m_Frequency);
+	}
+
+	u64 current_time = 0;
+
+#ifdef _WIN64
+	LARGE_INTEGER c;
+	QueryPerformanceCounter(&c);
+	current_time = c.QuadPart;
+#endif
+
+	return 1000.0 * (static_cast<double>(current_time - m_StartTime)) / static_cast<double>(m_Frequency);
 }
 
 double Lib::Timer::GetTimeSec() const
 {
-	return 0.0;
+	if (m_is_timer_paused)
+	{
+		return (static_cast<double>(m_PauseTime - m_StartTime)) / static_cast<double>(m_Frequency);
+	}
+
+	u64 current_time = 0;
+
+#ifdef _WIN64
+	LARGE_INTEGER c;
+	QueryPerformanceCounter(&c);
+	current_time = c.QuadPart;
+#endif
+
+	return (static_cast<double>(current_time - m_StartTime)) / static_cast<double>(m_Frequency);
 }
 
 u64 Lib::Timer::GetTicks() const
 {
-	return u64();
+	if (m_is_timer_paused)
+	{
+		return (m_PauseTime - m_StartTime);
+	}
+
+	u64 current_time = 0;
+
+#ifdef _WIN64
+	LARGE_INTEGER c;
+	QueryPerformanceCounter(&c);
+	current_time = c.QuadPart;
+#endif
+
+	return (current_time - m_StartTime);
 }
 
 u64 Lib::Timer::GetFrequency() const
 {
-	return u64();
+	return m_Frequency;
 }
+