Latest .Net Framework?
Yes
EDIT: I fixed it somehow.
EDIT2:
Man, survival mode is intense. I built an underground base in normal mode (with a cave filled with brown mushrooms), saved and went to survival. When I started, I decided to go outside to explore. I ended up going too far, and had to fight my way through hordes of Zombies, Arrow Skeletons, and exploding Bunchies. When I got to my place, I went downstairs to my relaxation room, and it was filled with spiders. SPIDERS. I put about 6 arrows in each, went upstairs to get mushrooms (I was low on health atm), and was ambushed by a zombie and died.