Win Logo, Pageup, Pagedn keys stopped working

[wj2016]

I upgraded my Dell Studio 1555 laptop from Windows 7 to Windows 10. Unfortunately, the Win logo key, Pageup, and Pagedown keys have ceased to work at all after the upgrade. Searching MS's site and the internet has not yet turned up a solution that works. How do I make Windows 10 recognize the keys?

 

[cCheeseCake]

are they completely dead or can you still assign them as custom key bindings in games and such?