Hi Kris_531,
I am Dave, I will help you with this.
1
On another working PC, click this link:
https://www.microsoft.com/en-us/software-downlo...
to download the Media Creation Tool to create a bootable USB on a blank 8GB USB flash drive.
Then, Boot your PC from the Installation Media you just created (change Boot Order in your BIOS) to begin installing Windows 11.
2
Activation depends on your type of Windows license.
A
If Windows came pre-installed on your PC, then you have an OEM licence stored on the motherboard and you have no need to worry, you can re-install Windows any time you need to and it will automatically activate.
B
If you purchased a retail Windows licence separately to your PC from Microsoft, then if you re-install windows and log into your Microsoft Account, it will activate automatically
C
If you purchased a retail Windows licence separately to your PC from a 3rd party retailer, you will need to have your product key available to re-activate Windows.