I looking for windows app expert/ developer

Our runtime is build in native C and executes TIC code files build by PLC programmers. We are experiencing very poor determanistic timing on windows 10, I reasently learned that it can be caused by winodws 10 core jumping, but we need expert help on this issue. [login to view URL] [login to view URL] This is basicly our probelm: Start time = time_in_micros sleep(1) End time = time_in_micros The difference betewwn start and end time should be between the requsested 1ms and (by experience on windows 7) 3-4ms as maks. On Windows 10 we get up to 40ms