Windows 10: The windows key I bought isn't working with my PC's windows

I bought my pc few months ago and it came with windows 10 pro installed. But few days ago a pop-up started appearing showing "Your windows license will expire soon". So, I bought a windows 10 pro activation key my pc is Windows 10 pro but when I used it it didn't work. And under the change product key button it says "The last product key ID: xxxxx-00000-00000-xxxx you entered can't be used on this copy of Windows. 0x803FA067" Although I'm not sure if it appeared after I tried to use my activation keythe one I bought as I have tried other activation key I found online.

:)

 

Printer isn´t working after latest update.

After the latest update from Windows, my Canon Pixma ip6600 printer isnt working. In Device Manager it shows up as working properly but when I go to print it isn´t listed as an option in any programs. Troubleshoot suggests it´s a USB 2 printer on a USB
3 port and that that´s the problem but that cant be since it worked fine before the update. I´ve tried to uninstall and plug it back in but that doesn´t work either.

 

UNABLE TO ACTIVATE WINDOWS AND NUM LOCK ISN"T WORKING

UNABLE TO ACTIVATE WINDOWS IN SYSTEM AS WELL AS NUM LOCK ISN"T WORKING

 

Cortana isn´t working

When I hit enter, it did something, but there´s still no Cortana, even after restart. So I tried it again, but now it says that it failed, because it´s already installed and it´s working in PC. So it should work, but Cortana still isn´t here.