Update: I've had a Norton Anti-Virus support team member troubleshoot to see if Norton is causing this issue (since I have Norton on my computer). Norton is not the issue. I guess I'll re-open a trouble ticket.
Minecraft is allowed to access the home network on every computer in my house, I've ensured that Windows Firewall is disabled, but the issue still exists - it isn't resolved. Are there any other options or possibilities?
Update: I've had a Norton Anti-Virus support team member troubleshoot to see if Norton is causing this issue (since I have Norton on my computer). Norton is not the issue. I guess I'll re-open a trouble ticket.