So I have 2 computers connected to a router.
On one PC (which I just upgraded the motherboard on), I could no longer access the router’s web management page via the router’s IP Address. I have internet but can’t access the router or any device in my LAN.
On the other PC I could. I also tried using my laptop connected via Wi-Fi and I could access it.
Edit: Using Windows 7 on both. MAC filtering is disabled.