WinTimerTester 1.1 is a portable, single-window executable that interfaces directly with the Windows Application Programming Interface (API). Specifically, it calls the QueryPerformanceFrequency and QueryPerformanceCounter functions. The program measures the raw frequency of the system clock active within the OS and tracks how well that clock syncs with real-world time.

Please ensure you have the necessary permissions and follow the usual precautions when downloading and running software from the internet.

WinTimerTester 1.1 is a specialized utility used by PC enthusiasts and gamers to verify the status of the High Precision Event Timer (HPET) and check for system timer synchronization.

Restart your PC and enter your BIOS/UEFI settings (usually by pressing or F2 on startup).

in Windows to see how it affects your WinTimerTester results?

Only download from reputable tech forums, GitHub repositories, or established overclocking databases.

The readme was mundane. "Measures timer resolution drift. v1.1 fixes QueryPerformanceCounter rollover bug." But the author’s name— J. Corrigan —made her stomach tighten. Jack Corrigan was a ghost in old dev forums. He’d vanished in 2005, same year Microsoft patched a zero-day that used a timer-based side channel to lift BitLocker keys. No one had proven the link, but Corrigan’s name appeared in the exploit’s comments.

Some users report seeing only two timing measurements (e.g.,