Pc wont connect to internet with ethernet or wifi adapter.

For about a year or two now, my pc will not connect to any network at all. I've tried pretty much everything so i decided to come on here and get some help. When the problem first occured, i thought maybe it was just my ethernet adapter not working so i went out and bought a wifi adapter. It turns out, it still doesn't work. When im connected via ethernet it says "identifying no internet access", and when i use my adapter, it says im connected, but it also says "unidentified network". If someone could manage to help me with this and get this problem solved for me, i would be super greatful because i've stayed up night after night trying to fix this issue and still haven't had any luck.