@IknowIfailPR​ Wow! You are really a life saver. The loop file actually works and the keyboard has not stopped working for me... Really appreciate your hard work man...

@IknowIfailPR I created the file and when I ran it I got an error, so I ran it as an administrator, which solved the run problem. The file looped but it did not help the keyboard issue. I wondered about a restart. I opened the Startup folder by typing shell:startup in run and clicking ok. I created a shortcut of the file and put the shortcut in startup. I modified it to Run as Administrator. Then I restarted. I was able to type in the login screen and have been able to ever since. I have restarted several times, and it continues to work. As @IknowIfailPR stated this isn't a fix just a workaround, but as workarounds go, it is pretty sweet. I have no idea how long this will work but for now it works!

Count me as another one with this issue. I paid $7000 for this as I had it custom made from Dell! Yet my keyboard won't work. Of course it's out of warranty and since this is a know issue I should not have to pay more money for a fix. I have tried EVERTTHING, except hardware replacements. Some of the fixes work for a few seconds but nothing has fixed this!!

I have the same problem, I have tried so many things ti try to solve it, but nothing works.

It is unbelievable that we are all paying for a premium product, and we are just getting a poor computer that needs an external mouse and keyboard.

I have been dealing with this problem over 3 months now, and Dell does nothing.

* Go HERE to the generic x17 R1 Drivers & Downloads page
* Click Category
* Click Ascending
* Scroll down and look for =
Alienware Cherry Keyboard Firmware Update Utility
Alienware Per Key Keyboard Firmware Update Utility
* Install the firmware update for your specific build
* When finished, restart the PC and retest

This ongoing issue has been crazy.  I have tried every fix the OP has and I always eventually get it working.  I have been in IT for 27 years at the same MSP.  We are a HP shop and I have been troubleshooting issues for all 27 years and even before that.  I have never seen keyboard issues like this before.  I have spent hours trying to solve this.  Turn off power management for all USB things in device manager. Install the HID update.  Delete the unknown USB device. Sometimes a combination of things work and sometimes just deleting the unknown device works.  And why does the only Dell troubleshooting document I can find only talks about the Cherry keyboard and not the Per Key update?  Why does the Support Assistant not say anything about a keyboard update needed?

I tried and this did not work for me. I noticed that each of these utilities create a file which documents the result of the "execution". In one it printed the number 3 and the other it printed the word "FAIL". What does this mean?

Same problem here; many of the same solutions were attempted to no avail.  In my case, I am able to get the keyboard to work temporarily in two circumstances. Firstly, whenever I restart/turn on the computer. I can also get it working when connecting or disconnecting something from the USB ports. In both circumstances, the keyboard will work as long as I don't stop using it for over a few seconds. I've seen a few posts about people being able to get the keyboard to respond when using the F1 overdrive feature, but this has not been the case for me. I, too, get the fail 3 error when attempting the driver update.

Going forward, contact "Get Help Now" icon on the right to start a live chat session. They need to first verify the warranty status so give them your Service Tag and email address. After troubleshooting, if still in warranty, they will need to setup hardware service. If your purchased warranty has expired, you must use the Dell out of warranty service. 

Same identical issue here, on a X17 R2.
I've been using an external keyboard for months, after attempting exactly all the very same OP's steps.
Pretty disapponted, considering all the money spent for a "premium" laptop.