why does it keep crashing?

Every time I try to blow stuff up or kill npcs the game just crashes… but it never did that when my friend played it on his steam account on the same computer… if anyone knows why it does this… can you please help?

PC specs please?

Stop playing the game on a fucking laptop or some old computer that runs Windows 2000. Also, read the sticky.

(User was banned for this post ("Unhelpful reply" - Benji))