I just bought a pair of PA7017 and although I could pair them and connect them to my router and PC within seconds, I haven't been able to get any internet connection through them.

What I mean by "internet connection" is quite literally the internet connection, as the PC-router connection works fine through the adapters (I can access my router's setting page just fine) so that's not the issue.

Both adapters are showing all three lights lighting up, tpPLC shows both adapters connected with a powerline rate of ~400 Mbps upload and ~250 Mbps download. The adapters are plugged directly in the wall and are about 20-25m apart. Task Manager occasionally shows my PC receiving up to 64 Kbps (wow!) but only momentarily (never for more than one ping at a time).

So far, I have only tried factory resetting both of them, which didn't change anything, but I'm having trouble thinking of solutions relevant to my issue as I do have some sort of connectivity between my PC and router, just no internet; ergo, please do not tell me to change my cables or something because I will lose it if you do (I'm joking, but please be pertinent, I've already read forum posts for hours :P).

I can't try both adapters in my router room because I do not own a laptop. I haven't found any firmware updates for my model either. 

Thanks in advance to anyone who can help me.