This user has the following games installed:
Sims 3, World Adventures, Ambitions, Late Night, Generations, Pets, Supernatural, Seasons, University Life
Game Present but Not Installed?
I have Steam's version of Sims 3, and have played it over 1000 hours.
Tonight when I went to fire it up, I got the "welcome to installing Sims 3!" page. I checked on my games section at Steam, and it seriously doesn't think I have it installed. It's there, though, physically, on my computer. (It recognizes that I own the base game and the DLC I do actually have, just "not installed.")
What's causing this, and what can I do about it?