My point was, that Nvidia drivers have caused hang ups on shut downs .
I do take your point, I am aware of some problems with Nvidia drivers There are two on the windows update site, one which is older than the one I am using. The newer one, some time ago I tried to windows update/install it, but it failed twice and I rolled back to my previous good driver.
There are prople that also don't recommend updating your video driver if all is well and up until I installed avast no driver problems.
Fastwrites have been contributed to it, along with bios updates not in current, AGP out of date, INF drivers out of sync, MOBO drivers per manufactuer not current etc.
My system (home build) is less than 18 months old everything compatible to start with. My card is Nvidia 440MX 64 Mb AGP4 and for non games use is fine - Motherboard Gigabyte GA-7VAX AGP8 FSB 333Mhz
Please don't get me wrong I am not saying you are wrong, simply that there have been no hardware changes, my system had no prior problems, so I find it hard to see how it can suddenly go wrong after a software installation.
David