Keys not being reognized
Today, my most recent version of NP++ (?8.4.7?) stopped recognizing Home, End, backspace, Enter and Delete; the arrow keys work. ALL keys work in Word & Excel. I downloaded and installed 8.4.8 (64 bit) accepting the defaults but no change.
There is nothing inherent in Notepad++ v8.4.7 or v8.4.8 that would reject those keys. My guess is that either you have something (AutoHotKey, or a rogue program, or malware or worse) that is intercepting those keys (maybe only sometimes, since they seem to work for MS products), or something was corrupted in your
%AppData%\Notepad++\shortcuts.xml, which is where keyboard shortcuts are defined.
To check the latter, the first step could be Settings > Shortcut Mapper > Scintilla Commands, then filter for HOME or END or the other keystrokes you mentioned, and see if they are still assigned to anything (or if they show up with a reddish background, which would indicate that some other command is also assigned to that keystroke, which could cause unexpected behavior)
Alternately, you could exit Notepad++, delete/rename
%AppData%\Notepad++\shortcuts.xml, and then restart Notepad++: it will recreate the
shortcuts.xmlfile with default values, and it should go back to working normally. If not, then it’s most likely that some external application has hijacked those keys in a weird manner.