I want to disable PageUp and PageDown keys on Dell Latitude 5590 running Windows 10. This is a work machine that I can't install any third party software on. This answer requires AutoHotkey.
Isn't there a way to do this in regedit.exe?
Warning: this solution involves editing the registry.
Open regedit.exe and browse to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout\". Add a new binary key value and name it "Scancode Map" (if it already exists, just edit it to change the values which are not zeroes). Enter:
00 00 00 00 00 00 00 00
03 00 00 00 00 00 49 E0
00 00 51 E0 00 00 00 00
Reboot and the PgUp and PgDn keys should be disabled.
Cheers!
This utility does the same thing as the registry edit in the answer from @johnbchron, but it adds a UI to make finding the correct key a little easier.