Microsoft Mouse and Keyboard Center doesn't recognize Sculpt Comfort Keyboard (Windows 8.1 x64)

There is no version 2.3.145 available for download from the official Microsoft hardware support website that I could find anywhere there.  The latest version available is 2.2.173.0.  You may well have installed hidden malware--and as yet unidentifiable because too new for current detection signatures--on your PC from the file download site where you obtained the unofficial driver.  Hopefully not but that is the chance you take when installing unofficial drivers and software from third-party sites.

I am Brazilian. And I downloaded from the Microsoft pt-br site the 2.3 version, you can check by your own here http://www.microsoft.com/hardware/pt-br/p/sculpt-comfort-keyboard/V4S-00005#support

You might not speak Portuguese, but you can understand this at the 'Suporte' section and then 'Softwares e Drivers'. 

I took a look at the English site too and I noticed that YOUR latest version is the 2.2

What is happening here?

What is happening? That is a very good question.  I do not know.  That is interesting, though, that the other-language support site got newer drivers and software first.  Hopefully the English sites will see the same soon.

Very interesting indeed. I don't know when they lauched this 2.3 version for us, but the changelog must be minimal, it might be changed only the language support even. 

The 2.2 and 2.3 version can be almost the same one who knows... 

But I can tell you that even in our 2.3 version the keyboard are not detected, which is funny in some point. 

Did you install both keyboard and mouse, or just the keyboard? In some cases, I have heard that if only one component is installed the other won't be recognized either.  Note sure about your situation.

Actually my mouse is not the Microsoft Sculpt Comfort, it is the Microsoft 3500. The Microsoft Mouse and Keyboard Center does recognize this mouse, but does not recognize the single Microsoft Sculpt Keyboard.

I already tried to install only the keyboard without any mouse, but with no success.

The keyboard is working properly for me. The only annoying thing is that the program are not notifying me when the Caps Lock or Num Lock is activated or not, and I can not have access to the complete keyboard configuration.

I originally bought the keyboard and had the aforementioned issues with the software not recognizing the keyboard (see my earlier threads).  I returned the keyboard and bought the desktop set with the Sculpt Comfort Keyboard and Mouse.  The keyboard and mouse were instantly recognized; no driver installation was needed.  How hard can be for MS to add the lone keyboard to its detection driver?  It's not an old keyboard.

I originally bought the keyboard and had the aforementioned issues with the software not recognizing the keyboard (see my earlier threads).  I returned the keyboard and bought the desktop set with the Sculpt Comfort Keyboard and Mouse.  The keyboard and mouse were instantly recognized; no driver installation was needed.  How hard can be for MS to add the lone keyboard to its detection driver?  It's not an old keyboard.

You are saying that the Microsoft Mouse and Keyboard Center does recognize your keyboard with the Sculpt Comfort Desktop?

That's simply ridiculous, it's a shame for Microsoft, because the keyboard are sold separated in my country and I believe that in others too. 

Even at the official Microsoft site they are not announcing the Sculpt Comfort DESKTOP yet. 

I don't know when they are going to release support to the keyboard alone. But I will have to live with it, that's because I already paid for my keyboard and only God knows when they will start to sell the kit here. 

At least it is working.

Yes.  Identical keyboard in the desktop set and it works with no issues.  Had it for a couple of months now with no issues.  Note that the desktop set IS listed as supported, yet the keyboard by itself isn't.  Go figure.

Yes.  Identical keyboard in the desktop set and it works with no issues.  Had it for a couple of months now with no issues.  Note that the desktop set IS listed as supported, yet the keyboard by itself isn't.  Go figure.

Ok, but that is too bad for those who bought only the keyboard.

At least here: http://www.microsoft.com/hardware/en-us/help/windows-8/troubleshooting/mouse/supported-devices

The Sculpt Comfort Desktop is not listed either. You can see that only the Sculpt Ergonomic Desktop is listed.

But if it is working just fine for you in the program, that's ok then.