We could not complete your itunes store request - Apple

"The network connection could not be stablished" - "An unknown error occurred (-50)"

So I downloaded iTunes on my new desktop and plugged my iPhone, when I try to sign in to download all my apps to my computer it says the above things. I have tried all I could to go around it, I uninstalled iTunes and re-installed again. I can't really find how to report this to Apple… So this has to do.

Any help?

Sounds like you need to take this to the Apple support forum

https://discussions.apple.com/...index.jspa

Currently apple seems to be having some issues. (Crazy I know) They should have it restored in a day or two but as of now they are not working properly. It's nothing you have done.