Windows has a built in antivirus that’s pretty dang solid nowadays. I run that with no additions considering I’m cautious about my link clicks.
Malwarebytes is free and good if you want to scan stuff that’s already downloaded.
AVG is known for being decent and free, but it might cause some bloating. It’s not good to have two anti viruses at once.
Tl;dr - the built in antivirus is fine if you’re using a PC
Update drivers here: https://support.hp.com/us-en/drivers/hp-15-dw0000-laptop-pc/26185492 . If that doesn’t fix it, you can try attaching an external monitor. If the monitor displays fine but not the laptop, then the screen’s broken.
You can purchase a replacement screen here: https://www.laptopscreen.com/English/model/HP/15-DW0000~SERIES/ replacing screens is pretty easy, but take it to a shop if you prefer.
Either you need to update your graphics driver or it’s a busted screen. What model computer is it?
Ooh this is a neat issue. Haven’t encountered it before so I’m spitballing. Ramdrive Z is a temporary holder for installation files and/or backup files. So that could be related. Do you have any pending Windows Updates? What happens if you nuke those NVIDIA folders, give it a reboot, then try again via Device Manager?
I’m not sure I follow. When you push the power button, do you see an image? Are you able to get into Windows? Does the PC only crash when you launch Fortnite?
EDIT: if it only crashes when you start Fortnite, have you uninstalled+reinstalled it?
Check that your graphics driver is up to date and feel around your computer to ensure it wasn’t overheating.