I can't see what your computer could have to do with it. Earlier on you mentioned using "a different browser" (Opera) and now you mention accessing the store through your son's laptop. Are you accessing the Windows Store through a browser rather than using the in-built Store app on your phone? By the way, I have Windows 10 running on my Lumia 1020, and find the latest "release preview" build is very smooth, fewer "Resuming" screens than on 8.1, better battery life in standby, but slightly poorer battery life when actively using the phone. Photos are fine with Lumia Camera. If you use your phone to record video, note that there is a bug which makes the phone record only in mono on Windows 10 (I never record videos so it's not big deal for me).