Not a technician, but I used to be a employee if that helps. I don't think anyone here has been a tech, not even the moderators, but I could be wrong.
Are you testing over wifi or ethernet? If ethernet, what model modem and router do you have and how is the computer connected to the router? Try looking at link speed; Windows key + R > NCPA.CPL > Right click on ethernet connection and left click on status > speed. If that is 100Mbps, then something is either wrong with the ethernet, the port on the router or the port on the computer. First, try replacing the ethernet. If only your wifi is slow, try to split the bands. Name the 2.4 and 5Ghz wifi slightly different, like add a 5 to the end of the 5Ghz network. Then make sure you connect to that 5Ghz network with good signal and test the speed. It's possible they disabled the ability to change band steering options withing the last few months. I think it may depend on which gateway you have and the firmware.
