Internet on this computer has been really slow for over a year. Most devices in my home are around 75 mbps download speed. Just did the speed test and got .6 for download and 7.37 upload. I’m not completely computer illiterate but I have no idea what has been going on. I’m running High Sierra, there are no updates available. I have 156 GB available. I have the computer in the same room as my modem. Please help