Windows 10: Middle Mouse Button is somehow being mapped to open the Windows Start Menu!!??

S

Swiss Frank

I'm actually a Unix programmer and most of my utilities, such as terminal emulators, and the applications I run via an X-Server, require middle-button to do a "paste" operation.


My Windows 10 Enterprise VErsion 1709 OS Build 16299.1451 PC has two human interface devices. The first is a Lenovo ThinkPad-style SK-8855 USB keyboard with a TrackPoint "mouse" and three buttons. Without any special drivers, the middle button of this keyboard works as expected.


The second is a Logitech T400 USB blutooth mouse. Again, without any special drivers it works fine as a mouse, with left and right buttons and the scroll wheel works as well. (And of course, moving the cursor!)


However, the middle button on the mouse only is causing the Windows Start Menu to open!!??!!


I've tried the much-respected utility program X-Mouse Button Control. This program allows button events to be remapped. It seems to be working fine. I can remap right-button to generate a left-button event, and it takes effect with both the Lenovo and the Logitech. But if I use it to remap the middle button to the left-button, it works on the Lenovo... while the Logitech is still causing the Windows Start Menu to open.


Basically it acts like there may either be Windows 10 functionality, or, something that my firm installs by default but forget they install, which is turning middle-button mouse events into Left Windows Key events.


So my questions:


1) Is there any Windows 10 functionality that might do this by default?


2) Is there any PC manufacturer functionality that could be doing this? How do I find out my PC vendor? (It's locked under my desk and I can't see it.)

3) How can I investigate whether there are any utilities that would be changing events, as X-Mouse Button Control is doing, but that are already installed and thus mapping this event before any other application can get it?


4) Is there any way to examine the user event stream and see the specific messages being generated when I hit the middle button? For instance on X-Windows there's a utility called xev that logs all the events taking place.


Any other ideas?

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