CTD after Swimming

[Cremdogz]

I'm trying to swim across some radiated water in the wasteland to get to the Citadel. After swimming across, I attempt to save, and it CTD. I tried making my way to the Citadel to find it's location, and when I fast travel to it, I CTD. If I actually got close to the Citadel, I would pick up a radio signal, and it would immediately CTD. I even ran all the way to the Riverboat Crossing, but once I found the location, it again CTD.

 

I at first thought it was the fact I was sprinting underwater using the Sprint Mod, but even without sprinting, I can't swim across. While yes I can take the bridge, this shouldn't be an issue in the first place, so I'd like to figure out what's wrong. I wouldn't worry about my computer's specs, they're fine, just know that it's dual-core. That being said, I constantly get CTDs in the wasteland and sometimes in other places, which really gets on my nerves, but I can sometimes get a full 2 hours in before it CTDs. I've just never had a problem saving before. Oh, and auto and quicksave are turned off.

 

While I'm at it, I'd like to know why there's so much lag in VATS now that I've installed mods. While not an issue indoors, in the wasteland, I get severe lag using VATS, whether targetting or executing. Like my swimming issue, it doesn't matter if I've been playing for a long time or just loaded the game. That being said, even after 2 hours, the game runs very smoothly.