Question Pairing Logitech keyboards & mice with PC and Dongles

[kep55]

Okay, boys and girls. It's time to play the Match Game. As I previously mentioned, I have two wireless keyboards ans one wireless mouse. I also have three non-unifying dongles and three unifying dongles. So which will work with which? The * signifies unifying dongle.

SERIAL NBR MODEL NBR PART NBR

1834SY04TXB8 K320 KYBRD 820-008582 / Y-R0067

1836LZ0MSXY8 M185 MOUSE 810-005232

1839SY065YW8 K270 KYBD 820-006477 / Y-R0042

LZ345LJA-DJ * C-U0007 C-24108

HK935HH-DJ * C-8941 C-U0007

HK132HH-DJ * C-24108 C-U0007

LZ141ZDA-DJR C-U0010 C-11077

LZ150ZEA-DJR C-U0010 C-11077

LZ829Z1A-DJR C-U0010 C-11077

 

[SkyNetRising]

I have two wireless keyboards ans one wireless mouse. I also have three non-unifying dongles and three unifying dongles.
So which will work with which?

Why are you asking this?
Try them all.

Connect dongle #1.

Pair with mouse. Does it work?​

Pair with keyboard #1. Does it work?​

Pair with keyboard #2. Does it work?​

​

Repeat with next dongle.

 

[Ralston18]

As above.

Also keep in mind all of the various "Logi" stuff that gets or can get installed.

That can be problematic as well.

 

[kep55]

Why are you asking this?
Try them all.

Connect dongle #1.

Pair with mouse. Does it work?​

Pair with keyboard #1. Does it work?​

Pair with keyboard #2. Does it work?​

​

Repeat with next dongle.

Already tried that in part. KB & Mouse worked for a bit then no KB and mouse went wonky.

 

[JeffreyP55]

Okay, boys and girls. It's time to play the Match Game. As I previously mentioned, I have two wireless keyboards ans one wireless mouse. I also have three non-unifying dongles and three unifying dongles. So which will work with which? The * signifies unifying dongle.

SERIAL NBR MODEL NBR PART NBR

1834SY04TXB8 K320 KYBRD 820-008582 / Y-R0067

1836LZ0MSXY8 M185 MOUSE 810-005232

1839SY065YW8 K270 KYBD 820-006477 / Y-R0042

LZ345LJA-DJ * C-U0007 C-24108

HK935HH-DJ * C-8941 C-U0007

HK132HH-DJ * C-24108 C-U0007

LZ141ZDA-DJR C-U0010 C-11077

LZ150ZEA-DJR C-U0010 C-11077

LZ829Z1A-DJR C-U0010 C-11077

I have several Logitech combos. Transmitters can be flaky. Unifying software is awful. Things are even worse running windows 11. Don't ask, test each transmitter.

 

[kep55]

I have several Logitech combos. Transmitters can be flaky. Unifying software is awful. Things are even worse running windows 11. Don't ask, test each transmitter.

As I'm finding out. Just bought a NEW MK540 combo. The mouse pairs in an instant. The keyboard, NOT on a dare. Since the pc came preinstalled with win11, I seriously thinking about replacing 11 with win10.

 

[Ralston18]

I would not expect the problem to be Windows 11 per se.

I am using Windows 11 (Pro): two systems both with Logitech combos.

I do not use the unifying software.

= = = =

If keyboards and/or mice do not work then look in Reliability History/Monitor and Event Viewer for any related error codes, warnings, or even informational entries that mention Logitech, the keyboard, or the mouse.

Device Manager also reports device related events.

Run "dism" and "sfc /scannow" - Windows may find and fix some related buggy or corrupted files.

Doublecheck that you have the correct drivers installed. Download directly from Logitech - no third party tools or installers.

 

[JeffreyP55]

As I'm finding out. Just bought a NEW MK540 combo. The mouse pairs in an instant. The keyboard, NOT on a dare. Since the pc came preinstalled with win11, I seriously thinking about replacing 11 with win10.

I had the same problem with the keyboard not pairing. It was the keyboard not transmitting data. I have one windows 10 and two windows 11 PC's running Logi combos.
Installing windows 10 is a bad idea. EOL for windows 10 is in two months.

 

[kep55]

I tried a K270, a K540 and a k350 keyboard with my win11 computer. I tried several unifying and standard usb dongles. NONE of the keyboards would pair with the computer. My winn11 box is updated as of 19 Aug 2025. Why won't the keyboards pair? Is this another example of mictosoft's sycophants purposely disabling their gear that worked well under the previous os in order to force the users to buy new kit as was done with win10?

I had the same problem with the keyboard not pairing. It was the keyboard not transmitting data. I have one windows 10 and two windows 11 PC's running Logi combos.
Installing windows 10 is a bad idea. EOL for windows 10 is in two months.

All three keyboards I tried???

 

[punkncat]

Just got to say that the orange dongles with the * make this super easy with the Unify software. As far as multi-device wireless keyboard and mouse go, there is (IMO) no better solution than Logitech.

You can purchase just the receiver/USB side of these as the Unify devices and learn them right in. Super simple, super easy. I will say that over a long period of time I see these fail about the same rate as mid to cheapo prices USB WiFi dongles, so keep that in mind. I keep an extra one on hand.

It is SUPER important to keep wired keyboard and mouse on hand for such things.

 

[USAFRet]

I have a 6 year old K830 that talks to my Win 11 Beelink without issue.

 

[punkncat]

I have a 6 year old K830 that talks to my Win 11 Beelink without issue.

I wasn't aware they do an illuminated version of this. The K400 is a staple in my household PC enviro.

Thanks!

 

[USAFRet]

I wasn't aware they do an illuminated version of this. The K400 is a staple in my household PC enviro.

Thanks!

Its for my HTPC. Works like a charm.