I have a 2010 Mac Pro. It's been running fine for years. I have a Belkin wireless router that I did some maintenance on. I updated the firmware and changed some wireless settings (including the SSID and the password). Now, the Internet has slowed to a crawl on the Mac Pro. But it's fine for the other computers on my network. I just ran a speed test on my laptop (not a Mac) and I got 26.43 Mbps. (The computers were in the same room when I ran the test). On the Mac Pro, I get 0.90 Mbps. Before I updated the router, they were about the same. What can I troubleshoot?