Can't move game window in windowed mode

LiaKnow​  Sorry for the late reply.  The only thing interesting I see in your dxdiag is that the Windows USB-C driver is crashing.  This may not be a big deal at all, in fact you might resolve it by simply disconnecting all USB-C devices (USB-A devices can stay) and restarting the computer.  But please don't reconnect these until you've tested the game without them.

If that doesn't help, and I doubt it will, please make sure you don't have Nvidia's GeForce Experience, or the newer Nvidia App, set to optimize Sims 3 settings.  If you do, or it's optimizing all your game settings, disable that function and delete Options.ini, in Documents > Electronic Arts > The Sims 3, then test again.

If that doesn't help either, or isn't relevant, please delete Options.ini if you haven't already, then start the game to create a new one.  Don't switch to fullscreen mode in-game.  Instead, quit at the Main Menu, then edit Options.ini to set fullscreen to 0 (zero) and resolution to 1920 1080 (if there's an 0 at the end, it can stay).  Then load the game again and see what you get.  It should launch in windowed mode and at your laptop's native resolution, so it'll look a bit squished, but that's fine, this is just a test.

Another option, whether the above steps help or not, is to play in Borderless mode.  Lazy Duchess's Smooth Patch has a Borderless option, and if you don't want to use that, the Windowed Borderless Gaming app is free and works well with Sims 3.  You wouldn't see your desktop behind the game, of course, but alt-tab should work fine.