Windows 10: I cant get my windows to activate, also cant get SLUI 4 to run

So I used a program that reset my hwid, it broke my windows activation. I get these error codes whenever I try to activate/troubleshoot.

:)

 

SLUI 4 not able to run

So I'm currently trying to activate my copy of windows after a hardware update (including motherboard). When I use the activation troubleshooter then select changed hardware it lets me correctly select this computer, but then says "unable to activate windows.
We can’t reactivate Windows on this device. Try again later. " I have tried this at a few different times over the past few days in case the "try again later" was actually accurate, but always got the same message.

I tried calling support and they told me to run "SLUI 4", however that doesn't run anything. No new process starts. They said to try SLUI 3, which just opens the activation settings page. Since SLUI 4 wouldn't work, support said there was nothing I can do
to activate windows... Hopefully someone here can help?

Edit: After it fails to activate, the error code 0x803F7001 is displayed in the activation settings window.

 

Trying to run slui 4 but nothing pops up

tl;dr When I run "slui 4" nothing pops up. No activation window, no error message, nothing. How can I fix it, and what else should I try to reactivate Win10?

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A few months ago, my wife upgraded from (a valid, activated) Windows 7 Pro N to Windows 10 Pro N (still activated). This morning, we replaced her motherboard and processor, and now we can't reactivate Windows.

I spent about 2 hours with Marte D (Ting) using the online support chat and the LogMeIn remote assistance tool. He tried many things, but nothing worked.

We tried running "slui 3" and entering the Windows 7 Pro N product key, but that yields error 0x803f7001.

He generated not one, but two, new product keys for me, and also tried entering those into the "slui 3" window. They didn't work either.

He tried many "slmgr" commands, including /rearm, /dti, and /rpik, but none of those led to success either.

Why not use phone activation? I'd love to! But when I try to run "slui 4", nothing appears. No idea why. I've tried running it from a command prompt too, in hopes that an error would be printed to the console, but no luck; it just returns instantly.

Marte was very patient, but after 2 hours, threw in the towel. He suggested I call the pro support team, since they'd have better tools to help me, so I tried it. The woman that spoke to me suggested I try entering the Win 7 product key into "slui 3", so
I tried again. Then she suggested I try "slui 4". When nothing popped up, she directed me to Microsoft's business support portal, and she rushed off the phone.

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What should I try next? I'm currently creating a Win 10 recovery drive, in hopes that it will repair my "slui" tool so that I can activate by phone, but would love any other suggestions you may have.

Thank you!

Erik

 

Trying to run slui 4 but nothing pops up

@JoeNamco: adding .exe did not help. Capitalizing the program name did not help. In all cases, the Activation Wizard does not appear.

@Andre Da Costa: the very first step of that article says to run "slui.exe 4". As I explained, the slui tool is not working properly. When I try to run it, nothing happens; no window appears, no error appears, nothing.