I have been having this problem for a while now. Almost a week. I tried a port forwarding suggestion in another post, it did nothing for me. I thought it was this game only, but it's other games as well. It just seems worse with ESO. My friend said it sounds like maybe somewhere between me and where the games are accessed something needs fixed, or upgraded. I have no idea how to go about getting this problem fixed. It started up like on Monday, and has come and gone ever since. The latency goes from 100-126 which is my normal, to 500ish, then to 999+... It does it over and over. I see people stop moving, nothing I press happens, then everyone fast forwards as the latency drops. It does it over, and over. The game has been unplayable. Downloading, streaming, and anything else I do on the web is fine. If I try to game especially in TESO it makes the game unplayable. What bothers me the most is there is no telling when it will start up, or for how long it will do it. It does it at random times day or night.
Can anyone help me figure this out?