Windows 10: serial number will not activate

My Alienware 14's OEM motherboard embedded serial doesn't work now. why? i also tried a legit serial for Win7 64bit pro sp1 and i get error code 0xC004E003 do you NOT support your own software unless it win 11 now?

:)

 

Serial number of self-built PC

I'm confused?? Is the computer listed in the Microsoft Account/Devices page or not? If not, you have to register it and it may take a couple of days to register in the Microsoft Store.

 

Serial number

The serial number should be on a sticker somewhere on the desktop.

You can also go into the BIOS to find the serial number.

This link has the info, it says laptop, but should be the same steps:

https://support.hp.com/us-en/document/c00034791

 

Windows 10 serial on OEM


So I'll summarize steps made...

1. Saved serial number (taken with Belarc Advisory) from preinstalled (half chinese language) Windows 8.1 (don't know exactly the version, suspect Windows 8.1 with bing) on tablet
2. Formatted tablet
3. Tried to make a clean Windows 10 (HOME, HOME N and also PRO, everytime with the same result) install with ISO taken with MediaCreationTool, during install (and also after completing installation) it says that the saved serial is not valid
4. Tried to reinstall Windows 8.1 (ISO taken with MediaCreationTool again) HOME, it says that the serial is not valid

So i suspect that the saved serial, is from a WINDOWS 8.1 WITH BING OEM version and this kind of ISO is not accessible/downloadable anywhere (at least I can't find it, any suggestion?)

Still not tried SHOWKEY with that serial, I am in office now, and the serial is saved on a usb pen at home, will try this evening.

So I'm stucked but if everything is like I suspect, it's incredible. If I have a tablet/notebook/netbook with Windows 8 preinstalled, it seems that I can update to Windows 10 without problems, but if I want to make a clean Windows 10 install that serial is not valid...