I have a specific need to be able to time accurately to tens of milliseconds. I use a specialst purpose-built GPS time receiver that both sends a time signal to the laptop and constantly adjusts the laptop clock within a few milliseconds of the right time. The problem is that when I am running video at 100 frames per second or faster the software can record the same time to the exact millisecond for two frames in succession. I have checked with the manufacturer of the software and the timing device inventor and they tell me this is a specific problem with Windows 7 and earlier that can sometimes be cured by hardware changes or alternatively by using Windows 10 which uses a more precise clock reader than Windows 7.
My laptop was designed to have Windows 10 but at the time it suited my needs to put Windows 7 Professional on it. Does anyone know if there is anything I can activate in the hardware or BIOS to enable the level of accuracy possible with Windows 10 without having to install Windows 10?