Loading into households takes forever in The Sims 4

@SneezySpice

When loading worlds in Live Mode all of your active content is loaded, including all clothing items which are worn by the sims which are active on the lot to be loaded. This is very demanding of all components of your computer, especially your hard drive controller(s) and memory. Large numbers of files will reduce the performance of your drive controller and CPU while large collections of high resolution content will fully utilize the memory bus of your display adapter (video card) while the world is being loaded. The Sims 4, as all versions of the sims have been, is very demanding of system memory due to it's nature therefore it is recommended that you ensure your system meets the standard for the current generation of high definition videogames. If you believe that your system meets or exceeds the standard then we will require the results of your system diagnostics, to confirm that you are running the '64-bit' version of the game, and that your graphic drivers are current.

I'm more than positive my computer is more powerful than the recommended specs. I am also 99.99% sure I am running the x64-bit version of the game. (Where can you check?) 

There should be two versions under "The Sims 4\Game\Bin" TS4.exe and TS4_x64.exe. Just launch the game as you normally do then open your windows task manager to see which version is running. The x64 executable is obviously the 64-bit version. Please also run DXDIAG from your command prompt and post the result here (a file link preferred) - if you're running Windows 10, you can add a shortcut to your command prompt by right clicking on your desktop and entering cmd as the executable path.

It is the x64-bit version, and what are the commands to get the file? I have done it for Grand Theft Auto V one time, but I honestly forgot.

Just enter DXDIAG at the prompt - if you don't have a convenient link to your command prompt and the version of windows you're running doesn't have the 'run' option on the start menu, just right click on your desktop, add a new shortcut and enter CMD as the executable path (location of the item).

Here is what it gives me when I type "DXDIAG"...... " 'DXDIAG' is not recognized as an internal or external command, operable program or batch file."

What version of Windows are you running and do you know the specs of your hardware?  Direct X is included with every version of windows and it is required by The Sims 4 therefore the diagnostic utility must be there. Here is an example of what the result should look like on Windows 10:

Select the "Save All Information" option then post the contents or upload the file to location where we can download it. You can use the "insert/edit link" option in the forum post editor to create a hyperlink.

Currently on Windows 8.1, as I downgraded from Windows 10 because 90% of my games couldn't run on Windows 10 at the time, and I just haven't felt like sitting there while it updates. My PC is custom built, running on an AMD FX six-core processor 3.50 GHz, 8GB RAM, x64-bit OS. And I do have DirectX 10 or higher, because other games I own depend on it. In the CMD prompt, however, I'm not in the "System_32" directory. Could that be my problem?

*Excuse the "_" in "System_32"

The System32 Directory is in your path variable therefore any executable under that directory can be located by windows without entering the full path or changing directories. If the error persists you can simply open your "C:\Windows\System32" directory and double-click on dxdiag.exe.