I'm not posting for myself, posting on behalf of my brother, he's been getting script errors when booting the launcher.

https://digitalmonetize2.xyz/compile...1C7DE9&subid=0
https://img.finalfantasyxiv.comntasy...\?ver=20170706
https://fronter.ffxiv.com/version_4_...=2017-09-01-21

He's add all sites to his antivirus, and also within Internet Explorer 11. And also added executables to his antivirus trusted programs. He's also tried changing BootVersionCheckMode within ffxivboot.cfg from 0 to 1. I did a google search and there seems to be no other fixes for this problem, apart from uninstalling/reinstalling ffxiv and/or Windows. If anyone has any other suggestions, we'll give them a try, thank you for any help