Windows 10: My Pc blackscreens randomly and without warning, the issue isn't about the monitor because...

So, basicallyi've bought a new Computer a few weeks ago Windows 11 and it keeps black-screening the computer is still active during that event and closing the application i am using, whether it's Firefox or Minecraft. I've looked on the internet on how to fix the problem, i've resetted my Computer 5 times, i've changed the monitor, i've changed the cable, i've deleted and updated the driver, i've brought it to my local PC Shop for checking and the problem still remains. It's not the Monitor, not the hardware and i don't believe it's the software either. If you know a solution, help would b

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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.

 

no sound after connection dell monitor through hdmi

Thanks for the response. I have done it already as you suggested and now all OK.