You could also try running TF2 in borderless window mode, maybe that will fix the nvidia crashes. In your launch options type in "-window -noborder -w *MONITORWIDTH* -h *MONITORHEIGTH*". Theres no major differences here, on some occasions it could cause a little fps loss, some people (like me) even gain more fps with it. The huge advantage of it is flawless alttabbing, since its running in windowmode, but with -noborder, it looks the same.
You could also just put it on windowmode in options and then use
ShiftWindow