I upgraded to Win 10 Nov 2015. 6 weeks ago (6months after installation) my computer went really slow. When I unplugged the dongle/modem it went fast.
My SP said they were not the issue but replaced it. All good for a couple of weeks then it slows again.
I contacted Microsoft who said let us change a few settings and all will be well. If not you have a hard drive problem. And to support this the hard drive played up and the auto tool fixed it. All worked well until it died.
It was so slow it said it would take over a day to copy a file to an external drive.
So I bought a new computer. It worked fine for 2hours. And yup internet slowed to 39 mins to download a 7mb file which my phone does in 2 secs when on the same WiFi service
Plus I disconnect the old computer from the internet and suddenly it file transfers really fast.
My SP say it is not them. It is a new computer. Sometimes it is speed as expected other times really slow. I have had the new computer for less than 12 hours
the speedtest had the speed at 5.8 upload so it should have done the file in second
Edge was the fastest, Firefox said 39mins, Edge said 11 mins (and took it too)
Does anyone have any suggestions