I have been having this problem with my desktop. Everytime I try to install League of Legends, it says that Pando Media cannot connect to the servers. I've tried just about everything (Disabling Firewall, Reinstalling PMB, Uninstalling every other game on my computer etc.) and I just cannot find something that can fix this.
I have this installed on my laptop and it runs just fine.
If I can get anyone's help, it would be amazing. My desktop is 1000x better than my laptop so that's why I want to install it.