i made a mistake by increasing the paging file size .
I'm not sure what you are saying there, sorry. - my suggestion was to indeed
increase the paging file size,to at least 32gb.
But if you can start the .exe file but the launcher cannot, that is usually an antivirus app getting in the way. What antivirus app do you use? You need to make sure all these apps are in its exceptions lists:
victoria3.exe (in the Steam victoria3-binaries folder)
dowser.exe (in the Steam victoria3-launcher folder)
C:/users/{UserName}/AppData/Local/Programs/Paradox Interactive/launcher-v2.2023..15/paradox launcher.exe
C:/users/{UserName}/AppData/Local/Programs/Paradox Interactive/bootstrapper-v2.exe
IF that doesn't help, also set each of those .exe files (EXCEPT victoria3.exe !) to run as the Windows Admin user.
Then the game should run from Steam/our launcher, and enable all the DLCs.