Disabling Shift key from overriding Numlock (or stopping Shift key from overriding Numlock for Numpad keys and using Shift as a Numpad 0-9 modifier)

If anyone knows how to disable/override the functionality in Windows of the Shift key temporarily invalidating the Numlock status so that the numpad 0-9 keys output as other keys (insert, end, down, page down, left, clear, right, home, up, page up), I would gladly pay for the solution to this problem.

Reason: I have an app (Reaper) that I use on both Mac and PC, and numerous shortcuts I have assigned in the app on the Mac simply won't work on PC, such as Shift and any Numpad numeric key (alone, or in combination with any other modifier key). The Mac is phenomenally better at using modifier keys for shortcuts in applications than the PC (with all of it's hard-coded win+key shortcuts, among others).

I'm forced to use a PC at work, which has been the source of countless hours of pain, torment, and frustration. But this little nightmare really takes the cake. It has been plaguing me for the past 2.5 years. I am at my wits end. I have probably spent days (even weeks, maybe) of my life trying numerous potential solutions to this problem already including AutoHotkey, EventGhost, and Pulover's Macro Creator. But none of them seem to be capable of allowing Shift+Numpad 0-9 functionality (or Ctrl+Alt+Shift, Alt+Shift, Ctrl+Win+Shift, etc.) through to Reaper (or any other app, for that matter). The Shift key either changes the Numpad key output as described above, or when used in combination with other modifiers, the Shift key is removed as a modifier, so only the other modifier keys are recognized in combination with the Numpad 0-9 keys.

I really need to find a way to use all of my Shift (and any other modifiers) plus Numpad 0-9 shortcuts on the PC. I am sincerely hoping that someone has found a solution for this horrifically frustrating problem.

Edit:Just to be perfectly clear, I'm not looking for/interested in workarounds for this problem. I'm hoping to find an actual solution that will remove the "Shift key temporarily overrides Numlock" functionality on a Windows PC - even if it requires a BIOS or registry hack, modifying some Windows system file/s, or using additional software to accomplish it. This is the solution I'm interested in and would pay to have. I want to be able to actually send shift+numpad(0-9) shortcuts to apps on the PC the way I can using a Mac. Thank you for any help anyone can provide in figuring out how to accomplish this!

Edit2:The following AHK script works, but the annoying Windows OS "feature" of converting Shift+Numpad(0-9) to Numpad(Ins-PgUp) is still screwing up the output - despite the fact that the shortcut is coming from AHK instead of physical keyboard input:

#If winActive("ahk_exe reaper.exe") +numpadEnd::    send +{numpad1}return

Using the AHK script, single keypress of Shift+NumpadEnd, Numlock OFF:

A0  02A     d   1.45    LShift23  04F h   d   0.22    NumpadEnd61  04F i   d   0.00    Numpad161  04F i   u   0.01    Numpad123  04F s   u   0.08    NumpadEndA0  02A     u   0.16    LShift

Without the AHK script, single keypress of Shift+NumpadEnd, Numlock OFF:

A0  02A     d   0.74    LShift23  04F     d   0.22    NumpadEnd23  04F     u   0.11    NumpadEndA0  02A     u   0.20    LShift

Either way, however, REAPER still sees the same shortcut pressed: Shift+End - NOT Shift+NumpadEnd. So the Shift+Numpad shortcuts will still conflict with other shortcuts I have bound using the regular home/end, PgUp/Down, arrow keys, and Insert.

So unfortunately, after repeated testing, this is still not a solution to the problem of needing to disable the annoying Windows OS functionality of converting Shift+Numpad(0-9) to the corresponding navigation keys (i.e. Shift overriding Numlock).