GetSystemTimePreciseAsFileTime is a Windows API that returns the current system time with the highest-resolution clock available, in FILETIME (100-nanosecond) units. It was introduced in Windows 8 and is not present in stock Windows 7 API surface. However, some patched or updated Windows 7 systems can expose it via updates or compatibility shims.
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If not found (Win7): Fall back to the standard GetSystemTimeAsFileTime. The Bottom Line Whether you choose a user-mode hook, a link-time
GetSystemTimePreciseAsFileTime is a beautiful function that Windows 7 users have historically been denied. Through the heroic efforts of the reverse engineering and open-source communities, patching is possible. Whether you choose a user-mode hook, a link-time wrapper, or a full kernel shim, you can achieve microsecond-accurate system time-of-day timestamps on Microsoft’s aging but beloved OS. Whether you choose a user-mode hook
Introduction:
In 2012, Microsoft released a patch for Windows 7 that introduced a new function, GetSystemTimePreciseAsFileTime, which provides high-precision timing. This patch was initially intended to address issues with timer inaccuracies in Windows 7, particularly in scenarios where high-frequency trading, scientific simulations, or other applications requiring precise timing were involved.
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