I am learning that the Wi-Fi adapter in a device may pose more of a problem than other factors in reducing speed than I had thought.
That is a simple problem to fix (<$20), and may save many an old machine from being discarded since we are now so dependant on the internet for everything we do.
I searched for USB Wi-Fi adapters on Amazon and selected the one with the best comments.
I was flabbergasted at the results. My old Dell ran 10 times faster than before when browsing.
These adapters plug right into a USB port. Drivers then come with them which need to be installed.
Then, after that happens, nothing will change until the old adapter is disabled in device manager. I did not find that indicated in the documentation but it is absolutely essential.