So as I mentioned in a previous entry I've started using nVidia's Vista drivers instead of their XP ones on my Tablet.

nVidia drivers stopped responding and Vista restarted them

This is with the new Windows Display Driver Model (WDDM), which takes advantage of Windows Vista's capabilities. One of those capabilities is running drivers in user mode instead of kernel mode, even the video driver.

In a previous operating system this crash would of brought down the whole system with a blue screen, but Windows detected the driver had stopped responding, shut down the video driver and restarted it, all within the space of about a second.

It does however mean I'm still waiting for better nVidia drivers.