I was away for a few days and when I turned on my computer, I noticed a sudden drop in my internet speed. I used to be able to download games from steam at around 3.2 Mb/s and it dropped to 800 Kb/s. Also, streaming videos online has drastically slowed down. When I went to the windows troubleshooter, it told me my dns wasn't working correctly. I searched online for this and found that I have to change my preferred dns to 22.214.171.124 and 126.96.36.199. After I did this, the troubleshooter said there was no problem, however, my internet is still a lot slower than it has been. If anyone knows what the problem is, please let me know.