I have 62 bit operating system but the game is making change to 32 bit

@Bgray111900   First of all you probably have a 64 bit system. I believe the game checks to see if you have a 32 bit or 64 bit system. I believe some packs require a 64 bit system to run. I think the game checks more then just a 32 bit or 64 bit system. A 32 bit system can only access 4 Gb of memory. It may (probably) checks for other requirements. The minimum system requirements have changed since the release of this game. Pleas check to see if your system meets or exceeds the minimum requirements.