Windows 10: Some of my Keys isn't working at all

I had my laptop sent off my insurance to replace the battery, when returned i noticed that my "w" key isn't working, sometimes "F2" & F4" don't work for a while but comes back functional and the Backlight keys "F10 and F11" isn't working properly whenever I use it with the fn key. I have used a an online key test to check if there are other keys not working, updated the driver to the keyboard, deleted and reinstalled it multiple times, update windows and the graphics driver as well, checked to see if functions were locked and thoroughly cleaned the keyboard's crevices.I cannot send it back

:)

 

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