sims 4 not opening

Playerjessie99  Your dxdiag doesn't list any Sims 4 errors, which suggests (although it isn't definitive) that the game is being blocked from starting rather than crashing.  Your dxdiag does list a couple of errors from a component of McAfee, and that could be blocking the game.

Do you need McAfee in general?  If not, I'd suggest uninstalling it entirely.  It's no better than Windows Defender at protecting your PC and has a higher rate of false positives.  Here's how to remove it:

https://www.mcafee.com/support/s/article/000001616?language=en_US

Even if you do want to keep using it, I'd remove it for now and test the game once.  As long as you don't do anything else at the same time, your computer should be safe.  If it works, set exceptions for TS4_x64, TS4_DX9_x64, and TS4_Launcher_x64, or the Bin folder they're in.  Set an exception for EADesktop.exe as well, all before launching the game with McAfee installed again.

Whether or not you're keeping McAfee, please repair the game (EA App > Sims 4 > Manage > Repair, or Steam > Sims 4 > Properties > Installed Files > Verify integrity of the game files) before trying to play.

I've changed the access now.. apologies.

Playerjessie99  The link to your dxdiag is restricted, as in, I'm being asked to sign in before I can view it.  Please either set it so that "anyone with the link" can view it, or just attach the dxdiag to a reply here.

Your saves are stored in Documents > Electronic Arts > The Sims 4, or in the Sims 4 folder you moved from that location if you've done so.  They should be intact even though the game won't be able to read them while they're anywhere else.