almost 2 years ago - Nephandus - Direct link
There are a couple of things you might want to try:

- Make sure, that the MS Visual C++ Redistributables (2015, 2017, 2019 and 2022) and .NET Framework are installed on your computer. You might want to double check that in your installed Apps section.
- When perfoming a clean install, make sure you delete all remaining HoI IV folders after de-install before re-installing, especially: Steam/SteamApps/common/HOI4 and Documents/Paradox/HOI4 (careful: the latter one contains the save game files as well, so you might want to back them up first).  
almost 2 years ago - Nephandus - Direct link
Nex. said: Already tried all of that several times before.

Same with my drivers and windows updates, but none of that will work for me, same error always appear or it won´t even open.

(This is a reply for Nephandus, idk why it doesn´t let me reply to the original comment)
Ok. Can you do me the favor and look if you have these two files on your computer:
vcruntime140.dll
msvcp140.dll

If yes, can you copy (not move) then into the HoI IV Game directory and try again?