Game Wont Launch

Well, as the title indicates.

I had an incident where i needed to replace my Motherboard and ever since i did that, game wont launch.

Everything has been tried, Scan & Repair, Reinstalling Battle.net giving all the .exe files permission to go as admin.

I even reinstalled Windows completely.

Game still wont launch. It just sits at “Launching” for 3 seconds then goes back to “Play”.

Getting a little frustrated, as other games from battle.net works. Just not WoW Retail and WoW Classic…

Any help would be appreciated!