So, if you are using w10 you can be one of the few people that get lag spikes. Basically you go to task manager and end "COM SUROGATE" task. A friend told me this. After ending it I stopped getting lag. I believe there is a glitch with ESO and W10 client.
Please test this. I would like to see if this is the problem of lag to other people too.
Hope you found this helpful.
oh and my pc is fine after ending it.
PC - EU
CP 1200+
Greenkoma - EP Grand Overlord Grade 2 (50) Stamina Templar
Greencoma - DC Grand Overlord Grade 2 (50) Stamina Dragonknight
Komahh - EP Colonel Grade 1 (25) Stamina Sorcerer
I swear I'm not a tank :^)