Essential Software Updates - popular software updates

Manageable Software Services - free software update service

Drivers Headquarters - collects most recent versions of drivers for your computer.  Not sure what you've got?  Download the free program Driver Detective and it will ferret out all hardware drivers on your system and let you know which version you have.

Healthy PC - Ziff Davis site loaded with information on PC care, Windows, Office, networking, and peripherals.

PC Lube and Tune - emphasis is on education and tutorials.

Help-site Computer Manuals - well-organized links to over 800 computer related documents and 125 web sites offering FAQs, online manuals, tutorials, and tech support.