Hey, two possible solutions for your problem.
1. search your comp for a file named "FFXIV_BOOT.cfg" - open it, change the B4EulaAgreement value to 1 instead of 0.
2. go into internet explorer -> tools -> internet options -> security tab -> custom level... -> script section -> ("Active Scripting" = Enabled)

If neither of those options are effective, try a reinstall with your virus protection set to disabled (you're supposed to when installing, didn't do it on desktop - got this error bs) however I did disable them when installing on my laptop, and it runs just as it should.