I began having problems with my internet connection earlier this week. Certain domains (www.nytimes.com) do not load at all. Others such as Facebook, load the login page, but do not allow me to proceed. Still others, such as Youtube, will play videos, but load slowly.
I am running a Dell Optiplex 960 with Windows Vista. I know this operating system is not supported, and I have ordered Windows 10.
My modem/router is an Arris SURFboard SBG6580, purchased in April 2015, so the warranty just ran out. I run Avast! Anti-virus
I have tried the following: computer reboot, ipconfig/DNSFlush and Renew from the command window, and resetting the modem
My ISP is Comcast and their technician said to try buying a new modem and computer. I am suspicious of this because most sites load without problem and I would think a bad modem would cause a more widespread issue.
I ran a tracert on one of the sites that would not load (www.nytimes.com) and got the following steps before timing out: