Can't move game window in windowed mode

Have you tried it witihout Mods? 

LiaKnow​  Please provide a dxdiag.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.

Thanks for helping

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.

puzzlezaddict​ Sorry for also replying late, I am having issues with the game running as a background process insted of opening that I'm trying to figure out before I can deal with the game window problem. I am assuming it's a mod being goofy so I'm just trying to figute out which one 

I'm also having this same exact problem!! I don't believe it to be a mod problem i genuinely believe this may be an issue with the game itself. As I have only bought it today yet it refuses to open no matter how many tips and tricks I've been following to try get it to open. It brings up the menu, I press the play button then nothing happens. Yet steam says its running. 

LiaKnow​  If you haven't already, try removing your mods.  If it helps, a core (not script) mod is the most likely culprit, so test those separately.  There are very few core mods out there, only about seven I think, including NRaas ErrorTrap and Simler90's mod; anything else should be fine as long as it's listed as compatible with patch 1.67 or above.

If your mods aren't the issue, does it help to restart your computer before trying to play?

dollboo​  If your computer has a 12th-gen or newer Intel processor, please see the accepted solution of this master thread:

Sims 3 won't open: Alder Lake (Intel 12th-gen) CPU | EA Forums - 8265525

If this doesn't help or isn't relevant, please start your own thread here, and attach a dxdiag to your post.  Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.