Best FREE Online Windows Tools

I have decided to create a series of posts that I am going to be calling the 'Best FREE Online ... Tools'. I consider these tools to be the best of the best, and all of them are free (unless otherwise noted). I plan to cover several different topics over the next few days and weeks.

Today's Topic
I have visited thousands of web sites, and these are the best and most useful Windows utilities sites I have found online. Each site can perform a different set of functions, such as: diagnostic, security, etc.. All these sites broken down into groups, based on the function that they can perform.

Note: All of these sites require Internet Explorer v6.0 or higher

Computer

• PC Pitstop (System Diagnostics)
• Microsoft Windows Update
  
• Microsoft Office Update

Security

• HouseCall (Anti-Virus Scanner)
  
• PestScan (Spyware Scanner)
  
• Symantec Internet Security Check (Security Scanner)
• Qualys' Browser Checkup (Browser Security Checkup)

Networking

• MyWebEx PC (PC Remote Control)

I have tried to make this list as complete as possible, so if you feel that I am missing a great site that should be included in this list please feel free to e-mail me (use the 'Send Comments' link on the side to this page to e-mail me). I will include all the updates in this post as soon as I am made aware of them and have verified the site.