@Mikone12 The Nvidia graphics driver on your laptop is four years old now, and the dxdiag lists a number of errors that are likely related to the driver. So it may help to install the newest version available from Nvidia:
https://www.nvidia.com/Download/driverResults.aspx/167109/en-us
However, the issue with your saves is likely not related, since it happened on a new computer as well. Did your sims recently celebrate Winterfest? There's a bug related to Father Winter, and while it should no longer happen after yesterday's patch, affected saves aren't automatically fixed. More details are here:
The telltale sign of the issue is save bloat, with the current save being anywhere from two to twenty times as large as the older ones. If this is what's happened to your save, you can try one of the workarounds described in the above post.
@Mikone12 It's entirely possible that the issues you're seeing are related to the graphics driver and not to the Father Winter issue. To double-check, you could use MCCC to delete homeless sims, "save as" to create a new save rather than overwriting the old one, quit and reload, and see how the save runs. If there's no improvement, you'll know that wasn't the issue, and if you want, you can delete the save where you removed the homeless sims and revert to the previous version.
@Mikone12 Yeah, that definitely sounds like the Father Winter issue, both the increased size of the save and the fact that even running the MCCC command to remove the homeless crashes the game. If you're particularly attached to the game, you could try deleting a few Father Winters at a time, then quitting and reloading when necessary; you might eventually get the number down to the point where the MCCC command works.
Otherwise, you might still hold on to the save for a while longer. You're not the only person who has too many sims to even delete properly, so it's always possible that someone will come up with a better approach.
