Getsystemtimepreciseasfiletime Windows 7 Upd
Article last updated: October 2025 – reflects Windows 7 extended support (ESU) status and confirmed update availability.
function, specifically regarding its availability and the updates related to Windows 7. GetSystemTimePreciseAsFileTime Introduced with Windows Server 2012
, this function is designed to provide the highest possible level of precision (less than 1 microsecond) for the current system date and time. Before this, developers typically used GetSystemTimeAsFileTime
, which is much faster but has a resolution limited by the system timer tick (usually 1ms to 15.6ms). For applications requiring sub-millisecond accuracy—like high-frequency trading or scientific logging—the "Precise" version became the gold standard. The Windows 7 Dilemma: Is there an Update? The short answer is
. There is no official Windows Update (KB) that "backports" or adds the GetSystemTimePreciseAsFileTime API to Windows 7. OS Requirement:
The function remains exclusive to Windows 8 / Windows Server 2012 and later. Why it's missing:
The function relies on underlying changes to how the Windows kernel interacts with hardware timers (like the HPET or TSC). These architectural changes were never rolled back into the Windows 7 kernel. How to Handle Windows 7 (The Workarounds)
If you are writing software that must run on both Windows 10/11 and Windows 7, you cannot call this function directly, or your program will fail to start on Windows 7 with an "Entry Point Not Found" error in Kernel32.dll 1. Dynamic Linking (The Safe Way) Instead of linking to the function at compile-time, use GetProcAddress to see if the function exists at runtime. VOID (WINAPI *PGETSYSTEMTIMEPRECISE)(LPFILETIME); GetBestTimestamp(LPFILETIME ft)
PGETSYSTEMTIMEPRECISE pGetSystemTimePrecise = (PGETSYSTEMTIMEPRECISE)GetProcAddress(GetModuleHandle(TEXT( "kernel32.dll" "GetSystemTimePreciseAsFileTime" (pGetSystemTimePrecise) // Use the high-precision version on Win 8/10/11 pGetSystemTimePrecise(ft); // Fallback for Windows 7 GetSystemTimeAsFileTime(ft); } Use code with caution. Copied to clipboard 2. The Manual "Precise" Implementation If you absolutely
sub-millisecond precision on Windows 7, you have to "roll your own" by combining two different timers: GetSystemTimeAsFileTime : Provides the absolute "wall clock" time (UTC). QueryPerformanceCounter : Provides a high-resolution relative offset.
By periodically recalibrating the QPC against the system time, you can interpolate a high-precision timestamp. However, this is complex because QPC can "drift" or jump due to power management (CPU frequency scaling) or sleep modes. Summary for Developers GetSystemTimeAsFileTime GetSystemTimePreciseAsFileTime Windows 7 Support Yes (Native) ~15.6ms (Low) <1μs (High) Performance Extremely Fast Slightly Slower Best Use Case General logging Benchmarking, synchronization Recommendation: If your project targets Windows 7, use dynamic loading to detect the function. If it's missing, fall back to GetSystemTimeAsFileTime
unless your application's core logic depends on microsecond accuracy, in which case you will need a custom QPC-based synchronization loop. of the QPC fallback, or is this for a compatibility report you are drafting?
The error "The procedure entry point GetSystemTimePreciseAsFileTime could not be located in the dynamic link library KERNEL32.dll" occurs because your software is trying to use a high-resolution time function that only exists in Windows 8 and newer.
Windows 7 does not natively support this specific API, and there is no official "patch" from Microsoft to add it. Common Causes for Users
Newer App Versions: Developers often update their tools (like Visual Studio) to use modern APIs, which can accidentally break compatibility with Windows 7.
Third-Party Libraries: Many modern applications use libraries like libuv or SDL that recently added calls to this function, causing crashes on older systems.
Qt6/Qt5 Toolchains: Programs built with Qt6 are particularly prone to this issue on Windows 7. How to Resolve the Issue 1. Use "VxKex" (Recommended for Power Users) getsystemtimepreciseasfiletime windows 7 upd
VxKex is a popular third-party tool designed to extend the Windows 7 kernel. It acts as a wrapper that "fakes" the presence of newer APIs like GetSystemTimePreciseAsFileTime, allowing modern programs to run without modification.
How to use: Install VxKex, right-click the application's executable, and enable "VxKex" in the compatibility settings. 2. Downgrade the Application 14.6 doesn't support Win 7? - FreeFileSync Forum
The function GetSystemTimePreciseAsFileTime is not available on Windows 7; it was first introduced in Windows 8. If you are seeing an "Entry Point Not Found" error, it is because the software you are running was compiled to require this newer API.
To resolve this, you can use a fallback strategy in your code or try a system-level workaround for existing software. C++ Fallback Implementation
If you are developing software that needs to run on both Windows 7 and newer versions, use GetProcAddress to check for the function at runtime. If it's missing, fall back to GetSystemTimeAsFileTime, which is supported on Windows 7.
typedef VOID (WINAPI *PGSTPAF)(LPFILETIME); void MyGetSystemTime(LPFILETIME lpTime) static PGSTPAF pGetSystemTimePreciseAsFileTime = (PGSTPAF)GetProcAddress( GetModuleHandleW(L"kernel32.dll"), "GetSystemTimePreciseAsFileTime"); if (pGetSystemTimePreciseAsFileTime) // Use high-precision if available (Win 8+) pGetSystemTimePreciseAsFileTime(lpTime); else // Fallback for Windows 7 GetSystemTimeAsFileTime(lpTime); Use code with caution. Copied to clipboard Fixing Existing Software Errors
If you are an end-user receiving this error when opening an app, try these solutions:
Install Windows Updates: Ensure you have KB2533623 installed. While it doesn't add the function, it fixes many related "Entry Point Not Found" issues in KERNEL32.dll.
Update Visual C++ Redistributable: Download the latest Visual C++ Redistributable from Microsoft Support.
Downgrade the App: If the developer recently updated their compiler (e.g., to MSVC v145), they may have dropped Windows 7 support. Look for a version of the software released before the update.
VxKex (Advanced): Some users utilize VxKex, an "extensions" project for Windows 7 that attempts to bridge missing Windows 8/10 APIs, though this is for advanced users and carries stability risks.
Are you trying to fix a specific application that won't start, or are you looking to implement this in your own code?
How to fix Entry Point not found error KERNEL32.dll Windows 7
The function GetSystemTimePreciseAsFileTime is not available on Windows 7; it was first introduced in Windows 8. Because Windows 7 has reached its official end of life, Microsoft has not released an update to backport this specific function. Understanding the Compatibility Gap
Applications built with modern development tools (such as Visual Studio’s v145 toolset) often include references to GetSystemTimePreciseAsFileTime by default. When these programs run on Windows 7, they fail to launch with the error: "The procedure entry point GetSystemTimePreciseAsFileTime could not be located in the dynamic link library KERNEL32.dll".
Functionality: It provides high-precision UTC time with a resolution of less than 1 microsecond. Limitation: It is strictly a Windows 8+ feature. Article last updated: October 2025 – reflects Windows
The Cause: Developers using newer libraries (like Qt 6 or recent Python/Rust versions) encounter this because those toolkits have dropped Windows 7 support to utilize newer system APIs. Proposed Solutions and Workarounds
Since there is no official update, users and developers must use one of the following strategies to maintain compatibility: 1. Implementation of Fallback (For Developers)
The standard way to handle this in code is to dynamically check for the function's existence at runtime. If it is missing, the application should fall back to the older GetSystemTimeAsFileTime function. GetSystemTimePreciseAsFileTime error on Windows 7 #101
The Windows API function GetSystemTimePreciseAsFileTime is only available on Windows 8 and later
. There is no official Microsoft update to add this function to Windows 7, as the operating system has reached its end of life
If you are encountering an "entry point not found" error for this function on Windows 7, it is because a program or library you are using was built with a newer toolset (like MSVC v145) that assumes a Windows 8 baseline. Visual Studio Developer Community Solutions for Developers
If you are writing code that needs to run on Windows 7, you cannot use this function directly. Instead, consider these alternatives:
The function GetSystemTimePreciseAsFileTime is a high-precision timing API that is not natively supported on Windows 7
. It was introduced with Windows 8 to provide UTC-synchronized timestamps with a resolution of less than 1 microsecond.
The following review outlines the impact of this API on Windows 7 systems and available workarounds for users facing "Entry Point Not Found" errors. The Conflict: Windows 7 vs. Modern Runtimes
Many users encounter errors (e.g., "The procedure entry point GetSystemTimePreciseAsFileTime could not be located in KERNEL32.dll") because modern development tools and runtimes have dropped legacy support. Compiler Shifts : Recent versions of the Microsoft Visual C++ (MSVC) Platform Toolset
(like v145) now generate binaries that depend on this API by default, causing immediate load-time failures on Windows 7. Library Dependencies : Major frameworks and libraries, including (starting with certain versions),
, have integrated this function for its superior precision, effectively ending their compatibility with Windows 7. The Julia Programming Language Technical Workarounds & "Fixes"
Since there is no official Microsoft update (KB) that adds this function to the Windows 7 kernel, users and developers must use one of these alternative approaches: Windows 7 support - General Usage - Julia Discourse
The GetSystemTimePreciseAsFileTime function is not supported on Windows 7. It was introduced with Windows 8 and Windows Server 2012 to provide high-precision system time (<1us).
The frequent appearance of this function in "Windows 7 update" discussions usually refers to application crashes rather than a system update you need to install. Why You See This Error on Windows 7 The short answer is
Users on Windows 7 often encounter the error message: “The procedure entry point GetSystemTimePreciseAsFileTime could not be located in the dynamic link library KERNEL32.dll”. This happens because:
Modern Toolchains: Developers using the latest versions of Visual Studio (v145 toolset) or Qt have dropped Windows 7 support.
Automatic Dependencies: Even if a programmer doesn't use the function, modern compilers may automatically insert calls to it for standard library features like std::chrono, making the resulting program incompatible with Windows 7.
Third-Party Libraries: Popular libraries like SDL or libuv began using this API for better timing, inadvertently breaking compatibility with older OS versions. Can You "Update" Windows 7 to Support It?
No official Microsoft update exists to add this function to Windows 7. Because the function is tied to core kernel changes in how time is handled, it cannot be simply patched in via a Knowledge Base (KB) update. Common Solutions and Workarounds
If you are trying to run a program that triggers this error on Windows 7, consider these options: For Users:
Downgrade the Software: Look for an older version of the application released before 2020–2021, when Windows 7 support was still common (e.g., Aseprite v1.3.9.2 or Strawberry 0.9.3).
Nightly/Beta Branches: Some developers provide "legacy" or nightly builds that specifically avoid this API to maintain Windows 7 compatibility. For Developers:
Use a Fallback: Implement a check to use GetSystemTimeAsFileTime (the standard version) if the OS is older than Windows 8.
Target Older Toolsets: Use older compiler toolsets (like v143 in Visual Studio) that do not have a hard dependency on this newer API.
Dynamic Loading: Use GetProcAddress to check for the function at runtime rather than linking to it statically.
Are you trying to run a specific program that’s giving you this error, or are you developing an app and looking for a way to support Windows 7? GetSystemTimePreciseAsFileTime error on Windows 7 #101
It retrieves the current system time with microsecond-level precision (1 µs resolution), unlike the older GetSystemTimeAsFileTime which updates roughly every 10–16 ms.
Great for:
Even with GetSystemTimePreciseAsFileTime, precision depends on hardware and system configuration:
| 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 |
The back-ported version relies on the same KeQueryPerformanceCounter internal mechanism but wrapped in FILETIME format. In practice, you can expect sub-microsecond precision on most modern hardware running the update.