1. WiFi is too easy to interfere with. I use my Android phone and the app WiFi Analyzer (free) then check the router's channel and see if I can do better.
2. Most W10 machines share Windows Updates. I never do that since I want all my speed. Disable it like this: https://www.howtogeek.com/224981/how-to-stop-windows-10-from-uploading-updates-to-other-pcs-over-the-internet/
3. Other common impacts are:
a. This PC has a HDD. That's now not what folk want.
b. The PC needs a Speccy report and reading (we do that here.) If you want to try that, read https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
c. Many of the Antivirus products slow down a PC. I'm using Windows Defender, Ublock Origin and Ghostery for my PC protection. I don't need more since I don't visit bad sites or torrent.
I have gotten my new wireless router since late November and it has been functioning great ever since. However sometimes my speed is not so fast or efficient am wondering if its because the router has been on a lot throughout the day without a reset or break. I also do that online speed test sometime and I guess it shows ok sometimes. My other thing is that I'm wondering if it is because 3rd party has access to my wireless network and is sharing the bandwidth? I've been searching online if this is possible and found this article:
So am kinda worried lol, my friend however tells me that the wireless is encrypted with a key???