Community Manager@Foxley828 Does the lot have the Off the Grid trait? That's a Known Issue:
In that case, please go right to the bug report.
Are you saying that you can only play this lot in windowed mode, or that you can only play Sims 4 in general in windowed mode? If the latter, please run a dxdiag and attach it to a post.
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/
I would also add that removing the -dx11 command line argument only reverts the game to DX9 mode if you have an Intel GPU or you've specifically selected DirectX 9 in the graphics options. DirectX 11 is the default for Nvidia and AMD GPUs now.
This Is my DxDiag file I hope this is helpful info
Community Manager
