I have a Logitech wireless keyboard K520.
Isolated problem is the decimal point [on number pad] which won't work when using excel, word, or other applications. All other keys function.
NumLock is 'on', I've updated the keyboard and unifying drivers, have blown air at the key in question to see if anything might be getting in the way, but still no joy.
Desktop PC; OS: Win 10 Pro.
Can anyone offer any advice please? Thanks.