This is what I recommend:
1. If everything is running fine, just hold on to them. Don't install if you have no problems.
2. If/when you do finally install, follow the golden rule: be prepared to lose all files and re-install everything from scratch.
Hopefully, you will never have such a huge mess that you will ahve to reinstall from a clean (reformatted) drive. But it can... and
does happen. Better to be prepared, than cursing irreplaceable data when it occurs.
Here is the problems... M$ is the richest, largest software company in the world. This renders them incapable of delivering software which is bug free. There are over 6,000 known bugs in Windoze XP, for instance. Usually, only a handful affect anyone at one time. But if a particularly nasty bug rears its ugly head at the wrong time (esp. during upgrades of the OS and/or drivers), the machine can be in such a state that an average user cannot recover, or at least it is much faster just to reformat and re-install from scratch.
So the trick is either to back up everything to another drive (HD or CD), or at least back up irreplaceable data (stuff that you download, create, edit, etc.).
Do not take driver installation lightly... to be unprepared for disaster seems to just attract it more

.