Recently my ping has been constantly over 200 and my download speed has been at 0.4mb/s. I've only had this problem on my pc, everywhere else it's normal. I can't tell if its some sort of ddos attack or something. If anyone has this problem or knows how to fix it let me know.
Copy files between machine in your house and see what rates you get. You can also run a tool called IPERF if you want to see the maximum rates you can get between your machines.
If it is really only 1 machine that is affected and all the others run fine then it can't really be your internet or even your router. It almost has to be some windows setting. You can confirm this by booting a linux USB image but that just proves it is not a hardware issue why windows does not work could be a lot of stuff.