Hello,
To do this, you will need a USB flash drive with at least 8GB of capacity. If you have another computer, download the Media Creation Tool (click here for Windows 10, and click here for Windows 11), and then run the exe once it downloads. If you get a UAC prompt, simply push Yes. Once the MCT comes up, insert your USB flash drive, choose your architecture, language, and time/currency format, make sure to push "USB Flash Drive", as this will move the files from the ISO to your flash drive. Let the MCT do its thing, and then eject the flash drive once it's done.
On the non-functioning computer, boot from the USB flash drive, and then once the Windows Installer comes up, push "Install Now". When installing, push the drive that has Windows on it, and at the bottom, push "Format". This will erase everything on the drive, including your files, but it will also delete the BitLocker encryption as well. Then, continue to install Windows.
After it finishes installing, complete the OOBE (Out-of-Box-Experience), and then you should be on your way.
If you don't have a second computer, ask a friend or family member.
Let me know how this goes.