klilyona I would DDU the Nvidia driver again and install the oldest version currently available from Nvidia. You can find them here:
https://www.nvidia.com/en-us/geforce/drivers/
Choose Game Ready Driver as the download type so you can go back further, and you should see drivers from July 1 and 22. Try the first, and then the second if the first doesn't help.
The reason I suggest this is because some newer drivers, including the one you currently have installed, appear to have had issues with older GPUs, although I don't know how much of what I saw at the time could be attributed to other factors. (There were clearly some problems with some versions though.) The newest drivers may be fine too, but I know that the ones from July 1 and 22 worked well.
If that doesn't help, try running Sims 4 on the Intel iGPU. You'd lose a lot of performance, but the important question is whether the game is stable. Open Windows Settings > System > Display > Graphics settings, click Browse, find TS4_x64 on the list, and choose the power-saving option. Then right-click the desktop, choose the Nvidia Control Panel, click Manage 3D Settings > Program Settings, find TS4_x64, and choose the integrated graphics processor. Both these settings matter at least some of the time.