The fact you have errors in other games tells me something is corrupt. tiworker.exe is a windows update program and the fact that this error might mean a Windows 10 patch is having problems. Check windows update for pending patches. The ntdll.dll could mean disc errors. A program like Macorit could test the integrity of the hard drive - macorit disk scanner (Macorit will take a while to complete). The program you ran before only tests critical windows programs and should have fixed them if corrupt. I'm beginning to think there may be some deeper problems.I'm running out of ideas and the wizard (my son) is out at the moment. At this point I may be tempted to put a different drive in and gen it up and see if you have the same problem. Instead of an upgrade install Windows 10 from scratch. You can download the Win 10 iso from Microsoft. If the new install works you will know your computer is good and you haven't lost anything (yet).
What I find weird though is that all the other games besides the Sims 4 run completely fine. The Sims seems to be the only game that is showing any problems. And what really bothers me is why it just happened out of nowhere. I'm also running the scan now, I'll update you if it finds anything.
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