Windows 10: I have recently changed my CPU for a new one. I have been unable to sign into my windows...

A security error message greets me at the sign in window when I boot up PC after CPU change. It prompts me to reset my pin which I go through the steps but it ultimately fails and dumps me back to the login again.

:)

 

Unable to activate windows 10 pro after hardware changed

I am unable to uninstall the key from my old motherboard as it was already sold together with the CPU.

Also during the Activation troubleshooter, I signed in to the microsoft account that ties my windows 10, my new device is not shown in the list when i select " I have recently changed my hardware " option

 

Recent (Save Files) - Change Default Settings to OneDrive

Hello -
Thanks for the return. Before I undertake changing the Registry, I have a question.
The steps in my Registry, for my version of Windows 10, were a bit different, but I think I eventually got to the right spot.
The last step is to change the number of places you want to list in Recent Places. In my case, the default Max Display listed 50 as the number. So, if I were to change that number, how do I know the Save As page will be one of those places? Or, a similar question, will this registry change delete the tab Recent from my Save As page? This is what I would like to happen.
When I received my computer in Nov. 2016, the Recent tab was not listed in the Save As page. Something caused it to be added over time. Which brings me to this second question. Would there be any benefit in deleting the changed registry listing and reverting back to the default listing? See attachment.
Jerry

 

unable to activate windows - after new hardware installation

I put a new motherboard, ram and cpu into my computer and now it says I am unable to activate windows. I go to settings>activation>troubleshoot>I changed hardware on this device recently>I choose my computer from the list>activate and it says "unable to
activate windows