What does that mean, "Windows refuses to use it"?

Killer Networking IS NOT the driver. It's part of Killer's software suite (which I don't want). I also have Killer NIC and latest one is 9.0.0.50 (just open below options) - I haven't noticed anything relevant when upgrading so I am using default Microsoft driver 9.0.0.42

After installing the above "driver", SDIO still shows the driver it just installed along a new one with the same name and different icon, which is the actual Killer Networking Software (screen shot attached). I did try installing that, but Windows is still using the Microsoft 9.0.0.42 driver. After installing both of those Killer Networking Software packages, SDIO still shows that first Killer Networking Software as as an updated driver available, plus now I have a bunch of extra services and software I can't use installed.

I tried using device manager to manually update the driver, and it says I'm already using the best driver for the device. I extracted the files from the SDIO driver package (DP_LAN_Others_23000.7x), and if I do the "have disk" method and browse to the files I extracted, Windows says its not a compatible driver for this device.

I used DriverStore Explorer to remove the stuff that was installed since I don't want it.

I bet it's probably the same software that is on Intel's site that contains the Killer Networking Software, which says it does not contain a driver for this card.

Looking at the files, the first part it installs looks to be some sort of extensions for the second part that is the actual Killer Networking Software, not an actual driver because it's just a .inf and .cat file. The KillerNetworkingExtension.inf does have the Killer E2400 listed in it, but the Killer Networking Software still doesn't see it.

Well not exactly. The first one that shows up has a gear icon is not the software. After installing that and refreshing, SDIO will now show another Killer networking Software available with a different icon (see screenshot posted in reply above), which is the Killer Bloatware, which I also don't want.

I also went back to the Microsoft 9.0.0.42 driver to see if it solved the issue I was having. It didn't, so I went back with the Rivet 9.0.0.50 driver.

I thought I had all of my drivers up to date, but SDIO did find some newer ones that I don't see on manufacturers driver pages. I like to keep my drivers up to date, and it is getting tiresome trying to hunt down drivers on various manufacturer websites, so SDIO is something I'm going to keep around.

Anyway, after updating drivers, I'm still having a weird issue that's bothering me. I don't think the problem I'm having is driver related or the card itself, but I figured it was worth a try. Since you have the same card maybe you can tell me if you're having it too?

When I download files from my browser, it always caps out at 1.2MB/s or 2.4MB/s. I always thought it was the site(s) I was downloading from doing it because downloads through things like Steam or GOG Galaxy max out my connection. A few weeks ago I was downloading a large mod for a game, and it was only doing 1.2MB/s. That was going to take a while, so I remote desktoped into another PC have and was going to let it download there. On that PC it downloaded at the full speed of my internet connection.

I have Firefox on both PCs, but I've tried other browsers. Like I said, it only happens when downloading through a browser (any browser). It doesn't matter what site either, it's consistently either 1.2MB/s or 2.4MB/s. Downloading through other things, game clients like Steam, Galaxy, for example will max out my connection.

My NIC card isn't exactly the same. Mine is E2200 (just from the top of my head). If you are downloading via http, your mileage may vary. Just a wild guess. When I am downloading from Steam, for instance, I get full 70-80MB/s.

Some sites may have a capped maximum download speed.

Salut, j'ai résolu ce problème de la façon suivante:
dans le task manager, end task le proccess "Killer Network Services"
et pour être sur qu'il ne redémarre pas dans le futur, il faut stopper le service du même nom.
Pour ça:
https://lecrabeinfo.net/demarrer-arreter-ou-desactiver-un-service-windows.html
Avec ça tu devrais retrouver un débit normal.
Ce problème m'a rendu fou. Je me suis inscrit ici pour te fournir la solution.

"Hi, I solved this problem in the following way:
in the task manager, end task the process “Killer Network Services”
and to be sure that it does not restart in the future, you must stop the service of the same name.
For that:
https://lecrabeinfo.net/start-stop-or-disable-a-windows-service.html
You should be back to normal speed with that.
This problem drove me crazy. I registered here to provide you with the solution."

Hi Glenn,
I answered in french, sorry about that. As it is automatically translated (i didn't activate anything 🤷‍♂️), I thought it was a french forum.

all good 🙂

If you're talking about the problem I was having with slow downloads in web browsers only, I managed to fix it. I've never used the Killer Networking software, so that wasn't the issue for me. It was, as I suspected, something in Windows itself. I found a forum post somewhere of someone having the same problem. The marked solution was to run the following in an admin command prompt:

netsh int tcp set global autotuninglevel=normal
netsh int tcp set global rss=enabled

Before I ran them, I ran "netsh int tcp show global" to see what they were set to on both of my Windows PCs. I believe the only one that was different was the autotuninglevel was disabled on the problem PC. I don't know how it got disabled, but setting it to normal fixed the problem.

Yes I was talking about the slow download.
Actually I don't use the Killer Networking Software, and even if they don't appear in the Settings/Apps list, they were installed and used to launch in background, causing slow downloads on my laptop.
Thanks for sharing how you solved it on your side.