Unable to access internet in Normal Boot mode

If I run the Windows Internet Connections troubleshooter, it says "Problems found: You might need to sign up with this network's Internet service provide to get access to the Internet."
But there are two other computers using the same Internet connection with no issues.

Well, I finally got this issue resolved, but only after reinstalling Windows. Using the original Windows install disk, I did an in-place upgrade install that left all the programs & data intact. I had to reinstall all the Windows updates again, though, which totaled close to 200.
Someone may wonder about the in-place upgrade and think that I upgraded to a higher level of Windows while I was at it. In fact, I did not upgrade. I just used that method to reinstall my current version of Windows without doing a Clean Install.

Thanks for providing your explanation with the correct terminology, Jack.