The two AltGr keys right next to the 0 are not working, the first one, the backslash is pretty handy... When I run On-Screen Keyboard (osk.exe) to reveal the keyboard it looks the same. It also presumes pressing AltGr and the key to the right of the 0 should produce a backslash... but nothing. So not with the On-Screen Keyboard and not with the keyboard.
All the rest of the keys, Shift, AltGr combinations work fine. The only way I can make it work is to switch to the US keyboard, start On-Screen Keyboard, click the slash and switch back to the Dutch keyboard (for every slash).
So I went through diverse keyboard setups but nothing. Is it something stupid?