I'm surprised not to have seen one yet. I recently had serious problems getting ESO to install properly, and it turns out that it was down to a piece of software called I.d.l.e. C.r.a.w.l.e.r. in my appdata folder. It's a pretty bad thing to have on your system anyway (thanks for not noticing that Kaspersky!) but if I'd known to look out for it I wouldn't have wasted a month trying to get ESO to work again.
ZOS, if you see this, a list of conflicts such as this posted somewhere would be awesome.
Fluff'ii - EP Sneaky-Cat-People
Elendil Ellesar - EP Stabby-Stabby-Healer
Khalisah al-Sinan - EP Fire-Breathing-Shieldy-Person
Liara Motierre - EP Blinky-Storm-Mage
Fetches-Fetches-Glitter - EP Lizard-Light-Smasher
Zevran Demnevanni - EP Sneaky-Vampire-Mage
Vindictal - EP Evil-necROMANCEr
Shepard Andersson - EP Smashy-Dragon-Man
Anduille - EP Cute-Bosmer-Bear-Lover
Eamhair Eimhir - EP Necro-Poison-Wolf-Girl
Orlog gro-Morkul - EP Smashy-Sorc-Orc
Lucien la Malfaisance - EP Book-Beamer