My usual speed is about 40 mbps download, but recently it slowed to about 10 - 12 mbps. Resetting the Arris modem with built in router helped. After running Malwarebytes, the speed slowed. Is there a setting that would prevent this? Actually, I'm not sure that Malwarebytes is the culprit.

The Malwarebytes slowdown sounds coincidental are you noticing a slow down or are you just seeing it through a speedtest?

Mostly through speed test, but seems slower to me.

Found that there was an update of Win 10 which installed. Shut down the computer and did a reset of my modem, router, and signal booster.

FWIW: Hope this holds; Results:

Attachment #1, (jpg file)

So the big question is... What level of service(speed) are you paying for? This can probably be found on you bill, or by calling your ISP.

Behind every good computer... is a jumble of wires 'n stuff.

Not sure just what I'm paying for, but was advised that I could get faster service with a different modem.
BTW, my reception is via wireless from a remote modem/router in another room. If I connect a computer directly to the modem, I can get much more speed.

That speed didn't hold and is down about 20 Mbps. I can live with that.
If I can find a way to move the modem closer to my primary computer setup, I should get considerably higher speed, but need to get the cable to the computer.

So it sounds like you're happy with your speed to the house, but would like to increase your speed over wifi.

You might be getting interference from other nearby wifi users who are using the same channel. If so, you may be able to switch your router to using a less congested channel.

For 2.4GHz setups, channels 1, 6, and 11 aren't overlapped by other channels so they are often the best choices for limiting interference, but as a result they tend to be the most used as well. Try to avoid channels with lots of other users and strong signals.

There are a number of apps you can run that will show you the all the nearby competing nets trying to use which channels. I use a free app called Wifi Analyzer on my Android phone and tablet. There's also a Windows version and possibly other versions as well.

Here's an article about the Windows version: https://lifehacker.com/see-how-bad-your-wifi-situation-really-is-with-wifi-ana-1826534324

Also make sure your wifi network is password protected to keep neighbors from connecting to your system and sucking up your wifi bandwidth.

If those hints don't give you sufficient improvement, another option, if running an actual ethernet cable from the router to the computer is out of the question, would be to use your house electrical wiring to carry the signal. For this you use an ethernet connected device plugged into an outlet near your router and its companion device plugged into an outlet near your computer. Here's an article about this concept:
https://www.techradar.com/news/networking/powerline-networking-what-you-need-to-know-930691

That's interesting information, Doug. I'll look into it.

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