Can you load the exe (not save game) and make it to options or is it dying before that?
If so, screw around in graphic options maybe reset things , could be some ini file hang over from your laptop....
For that matter, zap display.ini and make steam snag a new one however I think the game generates a new one anyways.
I'm wondering why you don't just have Steam install on your desktop anyway. Then just copy over the needed mod files.
However if it is only crashing when trying to load a save or when 'continuing' that almost always means a mod conflict, it has in my
situation. Other than the copy being legal or not, that most likely is the cause. You might have missed something. A directory maybe ?
Not having write privileges to that directory for the user account you are using mayhaps?