WiFi Connection SLOOW on one device and FAST on the other...

Hi folks. OK, here's what I need help with. I have the "Altice 1" combo cable box & router in my home. You can Google "Altice 1" to see what it is. In my home office, I have a Desktop running W-10 and a HP Laptop rinning W-10. The internet speed is so different in both. Here's the results after running a speed check using "Speedtest.net".

Dell PC: Ping-12ms
Download - 1.87 Mbps
Upload - 3.37 Mbps

On my laptop: Ping - 108ms
Download - 60.57Mbps
Upload - 14.93Mbps

See the difference? I have run startup and disabled non-essential software running at startup. I've done a disk cleanup. Any idea what I can check to see why the PC's WiFi connection/Internet is so slow?
NOTE: Because the Altice 1 system is an all in one (TV, Wireless Internet Router & Phone) in one, and because the box is in another room, it is impossible to direct wire the desktop PC to the box. Ideas??

 

I've never seen negative internet speeds before

Are both systems running the same antivirus?

Go into Device Manager on the Dell and expand network adapters. Right click on the wireless adapter and choose "uninstall", but don't delete the driver when asked. Once it's uninstalled, right click on any heading and choose "scan for hardware changes". That will re-install the wireless driver.

 

Also Tim, if the above doesn't work, then test the internet speed using Safe Mode With Networking. That will help determine if the issue is software or hardware related.

 

...and something else I thought of.

Confirm that both are the same network.

 

What security software do you have running on the Desktop?
Was the system or software running in the background running updates?
Have you put any configurations in TCP/IP settings?
How many browser tabs are open and doing what?
Have you tested the Desktop as the only thing connected and was there a difference?