System Error; Cannot start game launcher

[Raist]

The error code translates to HEX 0x800C008, which is basically a generic Download Failed message (interrupted connection)
https://msdn.microsoft.com/en-us/lib...=vs.85%29.aspx

Double-check your security--may need to refresh your exceptions for the FFXIV executables (or add them if you don't have them already). We've seen false-positives trip in the past after security software updates. It can also halt some programs when it detects a change in the executable file as well (version number, checksum, etc. that changes after patching).

In another thread someone noted they resolved it by enabling the TLS options in the advanced settings for Internet Explorer--just for good measure, may want to toggle on all the SSL and such as well just to be on the safe side?.