toolset (e.g., v145) cause generated binaries to depend on this API for standard C++ runtime functions, which breaks compatibility with Windows 7 by design. Precision Implementation : Unlike the older GetSystemTimeAsFileTime
Windows 7 was built during an era when hardware-based time tracking (like invariant TSC across multi-core processors) was still maturing. When Microsoft implemented GetSystemTimePreciseAsFileTime in Windows 8, they significantly overhauled the kernel-mode timekeeping subsystems to safely merge roll-over counters with hardware clocks without introducing sync drift. getsystemtimepreciseasfiletime windows 7 patched
Microsoft’s official documentation states the API requires Windows 8+ / Server 2012+, but an MSDN note (updated around 2019) acknowledges backport availability via Windows 7 updates. toolset (e
Enter GetSystemTimePreciseAsFileTime . Officially introduced in and Windows Server 2012 , this API delivers sub-microsecond precision (typically in the tens of nanoseconds) by reading the system’s performance counter. getsystemtimepreciseasfiletime windows 7 patched