Getsystemtimepreciseasfiletime Windows 7 Patched Apr 2026

The patch modifies the ntoskrnl.exe kernel module, specifically the KeQuerySystemTimePrecise function, which implements the GetSystemTimePreciseAsFileTime API. When called, this function communicates with the W32Time service to retrieve the current system time. The W32Time service uses various sources, such as the TSC, HPET, or other hardware-based timers, to calculate the system time.

The GetSystemTimePreciseAsFileTime function, introduced in Windows 7 SP1 and later patched for Windows 7, returns the system time in 100-nanosecond intervals, with a much higher degree of precision than traditional functions. This function utilizes the Windows Time Service (W32Time) and the system's underlying hardware capabilities, such as the CPU's timestamp counter (TSC) or the High-Precision Event Timer (HPET), to provide precise timing. getsystemtimepreciseasfiletime windows 7 patched

Here's a simple example of using GetSystemTimePreciseAsFileTime in C++: The patch modifies the ntoskrnl

"Windows 7 and the Quest for Precise Timing: A Deep Dive into GetSystemTimePreciseAsFileTime " The GetSystemTimePreciseAsFileTime function