New to this forum, I have started using free Razer GameBooster for several weeks now.
Have checked everything to shut down except where cautioned not to.
Also has options to optimize computer.
When you launch FSX from it, it shuts things down, and starts them back up when you exit FSX.
Also show your cpu, gpu, and motherboard temperatures at the bottom so you can see if FSX is stressing things and where.
Very handy and effective program.
Only network activity I have is when I get real weather, which I trust.