OK managed to fix it from advise from another user (thanks Nottmred88!!) don't know if you want add this to a sticky.
Once you update from Win7 to Win8 you need to delete your setting files
Football Manager FAQ
Then re-verify your cache
Football Manager FAQ
Next time you open the game it'll...
It's not too different but the fact the same laptop, same game, different OS suggests obviously that it's windows 8's issue.
I'll give the win7 run through at some point this weekend to see if that works, looks like a long work around.
I have played 5 seasons in Windows 7 on a new pretty much empty laptop. The sticky above only mentions up to Windows 7.
I haven't had anything as bad as this since the old FM10 days.
1 night of playing FM13 I've got about 4 days through a game and managed 1 match... 7 crash dumps.
Whats the...