Windows 7 only supports GetSystemTimeAsFileTime , which has a resolution of ~15.6ms (the system clock tick).
Check the OS version at runtime. If it's Windows 7, use GetSystemTimeAsFileTime . If it's Windows 8+, use the precise version. getsystemtimepreciseasfiletime windows 7 patched
Caveat : This simple version can drift due to DST changes or system time adjustments. Production versions must handle SetSystemTime events by refreshing the baseline. Windows 7 only supports GetSystemTimeAsFileTime , which has