Every time I try to run the game, it runs into an error in the application (0xc000007b). Why does this happens?
I've tried everything on YouTube, but nothing works.
A few things you can try:
(Re)installing the Microsoft Visual C++ Redistributables.
And, as a user on the Paradox forums mentions:
Also try this, please: Add EU4.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps allowed through list."
Check if you have any pending Windows updates, and install them.
Run DISM (on Windows 10).
If you want to keep trying replacing or deleting .dll files, you'd better use an app like Dependency Walker, as it lets you know what processes might actually be missing.