FSX acceleration and FSX activation error

G'day everyone,

So my computer failed a couple weeks ago and got it going no again but had to update to windows 10. Have spent two days trying to get FSX installed finally did! Now tryed to install acceleration and I am getting a message saying that I must activate FSX prior to installing acceleration. This confuses me as I did activate FSX. Does anyone know where I can go from here? I manually downloaded SP1 and SP2. If I don't install acceleration will I be missing out on anything if I just do my own thing anyway with regards to flying and add ons? I don't tend to use default aeroplanes or missions.

Any help appreciated, Daniel

I just upgraded my computer system to windows 10 hoping to run FSX /Acceleration on it on it as well..