In this guide I will teach you how to play on Windows 7.
How to Play Lost Ark on Windows 7
You will probably get a connection error when you try to enter the game.
Lost Ark fails to contact one of its internal servers on start up (service.maestro.us-east-1.social.games.a2z.com) as it cannot establish a secure connection with the server. The destination server rejects anything below TLS <1.2 whereas the game and the .NET Framework version it ships with try to forcefully contact this server using TLS 1.1.
The solution is to force the .NET installation to use OS TLS protocols instead of whatever the game is directing and disable insecure TLS protocols at OS level so that the default served protocol is TLS 1.2.
Windows 7 Service Pack 1 Download here is fix and run it, press yes to any warnings. This will disable TLS protocols <1.2 and force .NET to use OS TLS settings to request negotiation.
Full disclosure: This may have unintended consequences that could affect other programs/internet connections. To revert, just delete each key listed inside the file from regedit, everything should revert back to normal.
I found this solution from reddit, all thanks to u/iraproulx
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