Corrupted game after downloading mods

Hi luthienrising​, I think I've done the dxdiag but please let me know if you need something else. 

RhiBax​  Please update the driver for your Nvidia graphics card.  It's not throwing any errors as far as I can see, but it is two years old.  You can use the newest driver from Nvidia:

https://www.nvidia.com/en-us/geforce/drivers/results/257134/

Run the installer as an admin: right-click the download and select "Run as administrator."  Restart your laptop afterwards and before trying to play.

If that doesn't help, please try playing in a clean boot:

https://support.microsoft.com/en-us/topic/how-to-perform-a-clean-boot-in-windows-da2f9573-6eec-00ad-2f8a-a97a1807f3dd

The one service to leave enabled is the EABackgroundService, which the EA App needs in order to run.  Disable the rest as described.

When you reboot your computer, go through the Task Manager's background processes list shutting down any service that doesn't absolutely need to be running, for example anything from MSI Afterburner to RGB software might still be enabled.  If you accidentally kill a critical process and it doesn't restart on its own, just reboot your computer again.

Don't open anything other than Sims 4 and the EA App while testing, not even a browser window.

If this helps, you can selectively reenable services until you find the culprit, then either leave that disabled or (if it belongs to an app you want to keep using) let me know what it is so we can try to fix the underlying issue.

If you see the same issue in a clean boot, please try again, except with your computer offline.  You can sign into the EA App and put it in offline mode, then disable wifi and/or disconnect the ethernet cable before pressing Play.

puzzlezaddict​ thank you for getting back to me. I updated the driver as administrator and did a clean boot, the issue is still happening I do use Steam to launch the game though, so I haven't tested with the computer offline. Should I only be using the EA App for these tests? When I log into just the EA App, it launches Steam to play. 

RhiBax​  It should be fine to play through Steam, or at least I haven't come across any reason why it would make a difference for this particular issue.

Is your game installed on your laptop's internal drive?  The drive is more than fast enough, but if you have it on an external instead, please let me know.  And if you play with any peripherals connected, please test without them, still in a clean boot just to be thorough.

Please let me know whether you use a third-party antivirus as well, and test with it completely disabled.  While an AV would normally interfere even more (i.e. not letting the game load) or not at all, it's possible that it's slowing down certain processes while not blocking them entirely.

puzzlezaddict​ thank you for your reply, sorry for the delay. I only have the one internal hard drive and don't have peripherals connected. I also don't have an antivirus other than Windows Defender.