Create a system restore point before updating drivers. That's much easier for rollbacks, etc.
You didn't mention laptop vendor, etc. so your solution may vary. For example, for Lenovo, they block direct updates from Nvidia. There are ways around this that I've found (see link below), but I had no compelling reason to implement.
However, I once talked with a level 2 support person (someone who actually treated me like an intelligent software developer). He pointed out that one reason for blocking generic driver updates is that manufacturers add in extra stuff. In this case (Lenovo) they add (he said) stuff for their softkey support, etc.
But, he went on to say that usually, if you download and reinstall the softkey support module (I'm using this as an example), then it somehow restores the softkeys, but with the new video drivers. So, go figure.
The point here is that there's a good chance you can upgrade the driver, and then reinstall something for sound, etc. The trick is just that you need to reinstall the current driver, so that it is the "last one", etc.
For NVidia, there is a specific 3rd party forum site that provides work around .lNF files to allow installing the drivers on a lot of laptops, etc. They might also be able to specifically help you with your driver update. http://www.laptopvideo2go.com/
Let us know how it goes if you are successful. Also, to say again, I didn't update my video driver this way, so take what I say with a grain of salt!