diff --git a/src/common/steady_clock.cpp b/src/common/steady_clock.cpp
index 9415eed29..771c8a91c 100644
--- a/src/common/steady_clock.cpp
+++ b/src/common/steady_clock.cpp
@@ -24,6 +24,7 @@ static s64 WindowsQueryPerformanceCounter() {
     return counter.QuadPart;
 }
 
+#if (_WIN32_WINNT > _WIN32_WINNT_WIN7)
 static s64 GetSystemTimeNS() {
     // GetSystemTimePreciseAsFileTime returns the file time in 100ns units.
     static constexpr s64 Multiplier = 100;
@@ -36,6 +37,7 @@ static s64 GetSystemTimeNS() {
                          static_cast<s64>(filetime.dwLowDateTime) - WindowsEpochToUnixEpoch);
 }
 #endif
+#endif
 
 SteadyClock::time_point SteadyClock::Now() noexcept {
 #if defined(_WIN32)
@@ -65,6 +67,7 @@ SteadyClock::time_point SteadyClock::Now() noexcept {
 #endif
 }
 
+#if (_WIN32_WINNT > _WIN32_WINNT_WIN7)
 RealTimeClock::time_point RealTimeClock::Now() noexcept {
 #if defined(_WIN32)
     return time_point{duration{GetSystemTimeNS()}};
@@ -76,5 +79,6 @@ RealTimeClock::time_point RealTimeClock::Now() noexcept {
     return time_point{std::chrono::seconds{ts.tv_sec} + std::chrono::nanoseconds{ts.tv_nsec}};
 #endif
 }
+#endif
 
 }; // namespace Common
diff --git a/src/common/steady_clock.h b/src/common/steady_clock.h
index dbd0e2513..95a2b6ebc 100644
--- a/src/common/steady_clock.h
+++ b/src/common/steady_clock.h
@@ -20,6 +20,7 @@ struct SteadyClock {
     [[nodiscard]] static time_point Now() noexcept;
 };
 
+#if (_WIN32_WINNT > _WIN32_WINNT_WIN7)
 struct RealTimeClock {
     using rep = s64;
     using period = std::nano;
@@ -30,5 +31,6 @@ struct RealTimeClock {
 
     [[nodiscard]] static time_point Now() noexcept;
 };
+#endif
 
 } // namespace Common
diff --git a/src/common/windows/timer_resolution.cpp b/src/common/windows/timer_resolution.cpp
index 29c6e5c7e..23d40495a 100644
--- a/src/common/windows/timer_resolution.cpp
+++ b/src/common/windows/timer_resolution.cpp
@@ -60,6 +60,7 @@ TimerResolution GetTimerResolution() {
     };
 }
 
+#if (_WIN32_WINNT > _WIN32_WINNT_WIN7)
 void SetHighQoS() {
     // https://learn.microsoft.com/en-us/windows/win32/procthread/quality-of-service
     PROCESS_POWER_THROTTLING_STATE PowerThrottling{
@@ -71,6 +72,7 @@ void SetHighQoS() {
     SetProcessInformation(GetCurrentProcess(), ProcessPowerThrottling, &PowerThrottling,
                           sizeof(PROCESS_POWER_THROTTLING_STATE));
 }
+#endif
 
 } // Anonymous namespace
 
@@ -95,7 +97,9 @@ nanoseconds SetCurrentTimerResolution(nanoseconds timer_resolution) {
 }
 
 nanoseconds SetCurrentTimerResolutionToMaximum() {
+#if (_WIN32_WINNT > _WIN32_WINNT_WIN7)
     SetHighQoS();
+#endif
     return SetCurrentTimerResolution(GetMaximumTimerResolution());
 }
 
diff --git a/src/common/x64/rdtsc.cpp b/src/common/x64/rdtsc.cpp
index 9273274a3..274284e4f 100644
--- a/src/common/x64/rdtsc.cpp
+++ b/src/common/x64/rdtsc.cpp
@@ -22,11 +22,19 @@ u64 EstimateRDTSCFrequency() {
     FencedRDTSC();
 
     // Get the current time.
+#if (_WIN32_WINNT <= 0x0601) // _WIN32_WINNT_WIN7
+    const auto start_time = SteadyClock::Now();
+#else
     const auto start_time = RealTimeClock::Now();
+#endif
     const u64 tsc_start = FencedRDTSC();
     // Wait for 100 milliseconds.
     std::this_thread::sleep_for(std::chrono::milliseconds{100});
+#if (_WIN32_WINNT <= 0x0601) // _WIN32_WINNT_WIN7
+    const auto end_time = SteadyClock::Now();
+#else
     const auto end_time = RealTimeClock::Now();
+#endif
     const u64 tsc_end = FencedRDTSC();
     // Calculate differences.
     const u64 timer_diff = static_cast<u64>(