I get that message "LFS.exe has found a problem and needs to close, we are sorry for the inconvenience",
My PC's specs are relatively good: 1.8 GHz AMD Sempron CPU, 1GB RAM, 40GB HD, NVidia GeForce something (can't remember) 3D Video Card 128MB (Runs really heavy games), and BlaBlaBla, I don't remember them all.
it happens mostly with FBM on BL3.
It only happens online (happening offline only when I'm messing with LFSTweak). Unfortunately, I only have one connection and it is not that good, but It's better than dial-up lol.