I have done a local check of cache and all fine, this was though steam. Graphics is up to date and system.
I did Alt+tab out then back in twice before the game crashed. Not sure if this is why. The other crashes where similar, when I think about it, they have been because I've Alt+Tabed out.
Both "dxdiag" and "Dayz" Local uploaded in same file at following site as it is too big to upload.
Thanks
http://www.fileconvoy.com/dfl.php?id=gd54f4cc708fe1b7b999520871914c0aa380dfc974