Windows 10: Why isn’t my product key working?

Last night…I turned off my PC, switched it off then unplugged it in order to move it so that I can take an ac unit down.Long story short, after plugging in my PC again and turning it on, the mouse and keyboard wouldn’t work unless in the Bios.After hours of troubleshooting, I just decided to reformat the SSD my windows was installed on. Before being capable of reinstalling windows, I converted my SSD from MBR to GPT because windows wont install on MBR. Don’t ask me why it was on MBR, I don’t know. After reinstalling windows, all of ethernet, gaming, audio and other miscellaneous drivers, I c

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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.

 

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.

 

UNABLE TO ACTIVATE WINDOWS AND NUM LOCK ISN"T WORKING

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