I bought a new Dell Inspiron 7567 but whenever I connect to my home wifi the speeds go from around 60Mpbs to less than 2 Mbps. This only happens when I'm connected to this certain wifi. I tried it on my phone and through an ethernet cable and it worked perfectly. All other devices also work fine on my home wifi. I've restarted multiple times, uninstalled and reinstalled drivers, uninstalled the anti virus that came with it and turned off fire wall to make sure it wasn't that.