WiFi in hotel frequently disconnects momentarily only on Win10 desktop

I'm living in a Marriott hotel for two years now, same room, same desktop computer, same everything. The WiFi has been stable and fast all along except when their main control room has had an issue. Recently their system had an issue and since then, for about two weeks now, my desktop has lost the WiFi connection at least a few times a day, and I can always immediately reconnect whenever I notice it.

My laptop, two phones, and tablet have all kept their connection through the past few days of testing and watching. None are set to automatically reconnect. It's only my desktop running Windows 10 that's been losing WiFi a few times a day.

I've spoken to the company that provides Internet to the hotel and they've done all they can think of, which included remotely rebooting the routers that serve as "access points" nearest my room, ensuring those routers aren't sharing a channel, and resetting my account in their system. None of it has made a difference.

And I've changed WiFi adapters on the machine twice now. I had for the past two years been using a TP-Link AC1300 / Archer T4U Plus, which is a WiFi adapter that has a cable to a desktop antenna. I updated the driver six months ago and it's still current. It was plugged into a USB 3 port on a PCI card, as it has been all along the past two years.

When this issue arose two weeks ago I changed to a TP-Link USB AC600 / Archer T2U Nano, which is just a 1-inch dongle WiFi adapter. Driver is current. Plugged it into the built-in USB 3 port on the front of the computer. For about a day that worked without incident, which at least gave me hope. I decided to look a bit more high-end.

Then I installed a TP-Link AX3000 / Archer TX3000E, which is a PCI card WiFi adapter with a cable to a desktop antenna. Current driver. After a couple of hours, it too dropped WiFi.

I'm at a loss for what to try next. I'm running a business and have a lot riding on my having stable WiFi. The hotel and their provider are also at a loss by now.

I'll go back to the USB dongle plugged into the front of the machine but I'm not very optimistic that it will remain stable for long given my experiences thus far with the other two types of WiFi adapters.

Windows 10 updates are all current.

There's no malware (AFAIK).

The computer is an HP EliteDesk 800 G1 Tower.

WiFi properties show it connected at 5G. (I don't know a way to step that down to 2.4 to see if that helps, but I'll ask TP-Link tech support during business hours about that and if they have any other suggestions. I'll have to go back to the dongle and see if that shows it connected at 2.4 or 5G. Package says it does both.)

Any suggestions would be greatly appreciated.