It all depends on what recording you are referring to. If you think of windows 10 as the engine of a car, and if you bolt on added extras to the bodywork, the engine is still the same. Therefore any programs that have been added to a Windows 10 based computer, will work as they did before, and any recordings made will still be relevant. It is when you come to recordings that look at the "engine" of the system that the recording will not be relevant. If, for example, there is a recording referring specifically to Windows 8, it is highly likely that the recording will be of any use to those people who have a Windows 10 computer.