It may or may not be the answer, but is good to try regardless.. run MalwareBytes (free) to rule out malware. If you have a spare network cable, you should replace your current one to rule out that possibility a well.
Okay, so I tried your suggestions and found no malware with MalwareBytes, still same results. But when you said switch the network cable, that reminded me I had it running through my UPS, then to the modem. So I switched to a new cable AND ran it straight from modem to PC, and that did the trick!
Running it though the UPS had no effect whatsoever with my previous modem/internet so I have no idea why it is different with this set up.
Anyhow, thanks a lot for the help!