For some reason, every computer on my network is unable to go to IGN.com: Games, Cheats, Movies and More or gamestop.com

IGN is one of my favorite sites and I recently made a few purchases on Gamestop.com and I would like to be able to track them. I'm not sure why this has happened but no one can get to them on my network. I was able to pull both sites up on my cell phone. I've used PageFix, CCleaner, and I've gone through and cleaned out everything myself... I'm clueless on how to fix this.

Hi-- Welcome to PCHF-
Is this a private LAN --at home ?
Or a work network ?

private home network

You are the admin ?
running a firewall ? (hopefully you are)
add these sites to your "trusted" list ?
in firewall AND your browser ?

i am the admin
yes firewall and its trusted on everything

You can get on all other sites you try ?