Subject to CPU frequency scaling drift on older hardware. Need to recalibrate periodically.
Behavior and semantics
GetSystemTimePreciseAsFileTime function is not supported on Windows 7 getsystemtimepreciseasfiletime windows 7 upd
Notes:
Even with GetSystemTimePreciseAsFileTime , precision depends on hardware and system configuration: Subject to CPU frequency scaling drift on older hardware
| Operating System | Native Support | Notes | |----------------|----------------|-------| | Windows 10 / 11 | Yes | Full native support | | Windows 8 / 8.1 | Yes | Introduced with Windows 8 | | Windows 7 | No (without update) | Not present in original RTM or SP1 | | Windows Vista / XP | No | No update available |
Another common hurdle is encountering compilation errors or warnings, such as: warning C4013: 'GetSystemTimePreciseAsFileTime' undefined; assuming extern returning int . These errors occur because the Windows SDK headers conditionally hide the prototype for this function based on the defined _WIN32_WINNT macro. These errors occur because the Windows SDK headers
The key takeaway: Successful Windows 7 compatibility requires proactive planning, runtime detection, and appropriate fallbacks—not waiting for a patch that will never arrive.
The error usually has nothing to do with broken or corrupted system files. Instead, it is an caused by how newer software is compiled:
The update will fail to install. Install SP1 (KB976932) first.