Pretty much what the title says. I've reinstalled it a couple of times as nothing else would fix it, game would work for a while, then next time the pc is turned on and the game is opened it's crashed again. In addition to this, while playing I'll get 'error decompressing files' crashes every now and again.
I've added the download and the game itself to my antivirus exceptions list, I've turned graphics down to try and boost performance, nothing seems to prevent this happening.
Googling suggests I'm not the only one this is happening to.