My keyboard just does not want to be recognized?

So I've had this keyboard for a very long time now and have never had any problems with it yet, but as I tried to log in to my PC today, I noticed that he was not typing anything.

Then I opened the on-screen keyboard and logged in to see what's going on.

When I tried to re-insert my keyboard, it shows that Windows can't recognize the device.

I can't install any new drivers either because the keyboard is not recognized in Device Manager.

I've already tried everything, from PC restart to USB slot switch to the download of USBDeview in the hope that it somehow works again, which unfortunately does not.

When I then connected the keyboard to my parents' laptop, the same error occurred that the keyboard could not be recognized.

Now I do not know what to do anymore because I do not have a replacement keyboard.

If the keyboard does not work on the other PC, the keyboard itself will be defective. More than exchange is not left over

Today is Saturday and the electric markets are still open. Buy a new keyboard and dispose of the old one at the recycling center.

Select another USB port for the keyboard and connect.
Then start a proper PC restart (in the shutdown menu select "Restart").
If there's no hardware error, the keyboard will be recognized at startup and the driver will be installed.

He has already tried it on 2 PCs. This is more than any restart of the same PC: The error is more in the keyboard (1 error) than in 2 independent PC (2 errors that also have the same effect and should occur at the same time).