Personal PC Internet Issues

[HolidayHavok]

Ok, I am at somewhat of a loss. For the last week or so, my computer has been getting horrible internet connection both wirelessly and connected to ethernet, around the 20 Mbps range. Every other device that I own gets the proper speeds when connected to the same network via the same ethernet cable, around 250-300 Mbps download. What is strange to me though, is that when I run an ookla speedtest instead of the google one, it shows the proper speeds I should get on my personal pc, around 200-300 Mbps. The performance of my games and streams makes me believe the google speedtest is accurate, but I can't for the life of me get the download speed up. I have done every manner of driver reinstall and hardware check, to no avail. Contacted my ISP to ensure my modem and router hardware was not the issue, and they are not. Did a thorough virus scan and cleaned up every drive on my pc, to no avail. I've exhausted every option a quick google search will net me, to no avail. I have a wifi card installed as well, I removed that to see if speeds would change and they did not. At this point, I feel my only options are to do a windows reinstall or factory reset. Please help XD