Last one did for me, this one didn't, odd.
I haven't been asked to restart for some time now. I though it was since the 260 drives, but now that I think about it, it has been since at least the 258, maybe even the 256 series.
Though I know sometimes it asks for restart and sometimes it doesn't, even when I've been installing the same driver. I know the previous 260.89 drivers asked me to restart on my server but not on my main machine. I'm sure several factors go into weither it asks to restart or not. Most likely it will ask to restart if something is using the 3D driver and it can't de-initialize the old driver. Come to think of it, I think I still had F@H going on the server but not on my desktop, I wonder if that was why I had to restart it.
Since me don't game no more, me don't update. Last time me update, thee driver's don't recognise card. So me scared to update.
A quick driver sweeper usually clears that up in the few instances it happened to me.