Just to throw in some more info, Windows 7 is completely up to date. Most recent versions of DirectX, .NET, etc. etc.
All drivers are up to date.
Fatal Error on Autosave
Steps to reproduce: Literally the games crashes to Windows with a fatal error when I try and save/quit, or when auto save kicks in. I haven't been able to play any further than the end of the first Winter.
Windows 7 64-bit
Intel i5-4590 CPU @ 3.30 GHz
ATI Radeon HD 3400
16GB RAM