When to Alt + Enter ?

I pressed it in Menu, in Game nothing works ....dunno , yesterday was all fine and now this crap i just cant belive it =(

I need Help when I try to exit the train station at start I get error report and crash to deskop and also with error report i get this :

http://i353.photobucket.com/albums/r391/NobodieCro/eROOR-1.jpg ...In vanilla it works fine buth when i try with SMOD reduxe V6 it crashed ...Well it crashes mostly with SMOD mods , any kinde of it ...Can any1 Help ..Ty

CHeers

I need Help when I try to exit the train station at start I get error report and crash to deskop and also with error report i get this :

http://i353.photobucket.com/albums/r391/NobodieCro/eROOR-1.jpg ...In vanilla it works fine buth when i try with SMOD reduxe V6 it crashed ...Well it crashes mostly with SMOD mods , any kinde of it ...Can any1 Help ..Ty

CHeers