nvidia windows kernel mode driver version 285.62 stopped responding - GeForce Forums

hey just upgraded from a gt230 to gtx560 Ti (Oc 900MHz) and i get "nvidia windows kernel mode driver version 285.62 stopped responding" all the time (2-3 trys just to get the computer running) i have tryd updating the driver ( old,new and beta version, an

forums.geforce.com