Windows 10: Windows won't let me change my product key/pc problems

Recently I have been trying to activate my production key. I went into my settings/update and security/activation and looked at the error "0xC004C003" Because I don't have a key then I went on to press "Change Product Key" and nothing happens. I press it then it does nothing, freezes my settings cant close it or minimalize. And when the press anywhere else on the page it makes a weird noise? I have o idea what to do? I have also been getting Nemours's problems on my PC like I don't have access to anything on my PC through administrator even though my USER is an administrator in control panel a

:)

 

Get Windows 10 app not responding after changing product key

• Windows 8.1 was with KMS license
• Reserved free upgrade to Windows 10
• Bought Windows 8.1 product key and changed product key via PC info app
• Get Windows 10 app not responding.

Steps tried

• Uninstall KB 3035583 using wusa /uninstall
• Restart
• Reinstall KB 3035583 using Windows Update
• Restart
• Click on Get Windows 10 icon, not responding.

 

Why was I not asked for a product key when upgrading to Win 10?

According to your spec you have Win 10 Pro, but perhaps that doesn't reflect your PC.

You haven't stated which edition of Win 10 you have on this machine, nor what your Win 10 key is for.

For example, if you already have Win 10 Pro and your key is Win 10 Home, that would be a retrograde step.

For interest only:
Change Product Key in Windows 10

More on product key if you search this list or look at 'Related Tutorials' in the above.
Windows 10 Tutorial Index

 

Skype won´t wok in 17063

Skype Won´t work... games won´t work...

Making backup and re-format...

Maybe I Install a Windows 7 again, At least, all of my games run smoothly ...Sadness!!

*Banghead