Device Doctor is a great (free) way to keep your drivers (even for your ‘unknown devices’ in Device Manager) up to date so your computer will function well and will be secure. Your programs will run better and faster when your drivers are up to date.
Device Doctor Download Link: http://www.devicedoctor.com/
And speaking of programs…
Keep your programs up to date (and your computer more secure) by taking advantage of this little gem Update Notifier (or alternatvely, TechTracker):
Update Notifier is a small utility that scans your computer for installed software and displays a list of updates. Most of the time having the latest version of a software is a good thing. Usually software updates add new features, which makes the software more useful. Also with every update a software becomes more secure and more stable by fixing bugs and vulnerabilities from previous versions.
Of the two, I prefer TechTracker. For a good article about it (with screenies), go HERE.
Update Notifier download link: http://cleansofts.org/
Tech Tracker download link: http://www.cnet.com/techtracker-free/