Not getting the speed I'm paying for

[Darren]

I'd get your ISP back out. Something isn't right with the router/modem.

 

[Cromewell]

You are definitely not on WiFi with your PC right?

I'd get your ISP back out. Something isn't right with the router/modem.

Or the line. When they come out, have them do the test on your machine as well. They could very well have tested against a service inside their own network.

 

[millz]

Your desktop has a wireless network adapter amd it's connecting to your modem wirelessly on the 4ghz band rather than using your wired connection.

Turn off your wireless network and force the wired connection.

That's my guess at least.