| Environment | Typical Precision | |-------------|-------------------| | Default Windows 7 (no update) | ~10–16 ms | | Windows 7 + KB2670838 | ~0.5 – 1 μs (microsecond) | | Windows 10/11 | ~0.1 – 1 μs |
If you need the high precision provided by GetSystemTimePreciseAsFileTime , you may want to consider upgrading to Windows 8 or a later version of Windows.
– Measuring frame render times precisely to detect micro-stutters. getsystemtimepreciseasfiletime windows 7 upd
wmic qfe list hotfixid | find "KB2813345"
The function GetSystemTimePreciseAsFileTime is a high-precision timing API that is not natively supported on Windows 7 When the OS cannot find it, it halts
Consequently, even if a program code is entirely compatible with Windows 7, the binary’s export table forces KERNEL32.dll to search for GetSystemTimePreciseAsFileTime at load time. When the OS cannot find it, it halts the program and displays the "Entry Point Not Found" crash window. Solutions for Developers
If you cannot guarantee KB3033929, use one of these fallbacks: When the OS cannot find it
Before diving into the update, let’s define the function.