@smeezus Thanks for reaching out!. Is your machine 32 bit or 64 bit? which installer you are trying to download. from where ( which website) you are downloading brave?
Are there any brave processes already running in your machine. Can you please provide all these additional info. We will try to help you out.
Also, you can check the below post, where in you can find bunch of workaround to insatll and setup brave on Windows 7. If nothing works, please revert back.
https://community.brave.com/t/problems-installing-brave-on-a-windows-7-ultimate-laptop/28249/9
Thanks!