Please note that to run Victoria 3 your processor needs to be AVX compatible! If you are experiencing issues starting the game (the launcher for example giving you a strange error or being unable to start the game via the .exe file) please verify that your processor does support AVX!
Please refer to this guide on how to figure out if this is the case or not. If you don't have an AVX compatible processor the game will never run and you should request a refund from where you bought it.
https://quoramarketing.com/how-to-know-or-check-if-cpu-supports-avx-instructions/