Freezing and Crashing
Babzbaggins Your dxdiag lists a few crashes of the graphics driver, or one of them. Since the Nvidia driver is from 2023, you may simply be able to update it to fix the problem. I would suggest using a slightly older driver because I've seen a couple reports of issues with the current one, and it's easy to update to a newer driver but more complicated to install an older one. You can get all the new-enough drivers here:
https://www.nvidia.com/en-us/geforce/drivers/
Choose Game Ready Driver as the Download Type to go back further. (You don't want the Studio drivers, which are for professional workloads.) The driver from mid-March should be fine.
Run the installer as an admin: right-click the download and select "Run as administrator." Choose the Custom (not Express) install method, and check the box to perform a clean install. Restart afterwards and before trying to play.
If you get another crash, please look for new errors in the Reliability Monitor. Hit Windows key-R and enter "perfmon /rel" without quotes, and you'll see a chart of errors and updates with a column for each day. Today is on the right.
Look for an error that happened at exactly the time of your most recent Sims 4 crash, specifically after reinstalling the driver. If you find one, double-click it to see more details, then copy that info and paste it into a reply here. If you don't see a new error, check back in an hour or so—the Reliability Monitor doesn't always update right away.
Separately, let me know whether the BlueScreens you're getting are happening while you're playing. I know your computer freezes, but that's different than a shutdown.
