Gameplay crashes

@amrenthebat  Sorry for the late reply; I was offline for a while.  That sounds like a potentially serious issue, one that makes it an even better idea to do a repair install.  Safe mode is helpful, for sure, but you can't do much in it, including playing games at anything better than the worst possible performance.  If you can't even properly use your computer when not in safe mode, there's definitely a system issue.

@amrenthebat  I hadn't remembered that part of the instructions, but if the guide says you can't run a repair install in safe mode, I believe it.  Instead, try using DISM to repair windows from a mounted image.  In this guide:

https://www.windowscentral.com/how-use-dism-command-line-utility-repair-windows-10-image

Scroll down to "Fix Windows with DISM using install.wim image."  I believe it would work in safe mode, although I'm not completely sure; the worst that could happen is DISM would throw an error before starting.  I also believe that the newest version of Windows would work, as in, the one you'd get through the Media Creation Tool, but just in case, you can download an ISO for your current version of Windows here:

https://tb.rg-adguard.net/public.php

Choose, in order, Windows (Final), the newer 2009 option, Windows 10, English, and x64.  Like I said though, the newer build you'd get directly from Microsoft is probably fine too.

For downloading purposes, safe mode with networking should work.

@amrenthebat  Did you get the error with the Media Creation Tool or with something else?

@amrenthebat  Then you can try the site I linked.  I don't know why the Media Creation Tool isn't working, but that just suggests even more strongly that there's a fundamental issue with Windows that needs to be addressed.

@amrenthebat  The idea, at least at the moment, isn't to install a new version of Windows.  It's to use the Windows image you downloaded as a source for DISM.  It's the part in this link:

https://www.windowscentral.com/how-use-dism-command-line-utility-repair-windows-10-image

under Fix Windows 10 recovery image" towards the bottom of the page.  The instructions provided show how to create an ISO using the Media Creation Tool, but you now have an ISO from another source you can use instead.  So you're mounting the ISO, as you did, then entering this into DISM:

DISM /Online /Cleanup-Image /RestoreHealth /Source:X:\Sources\install.wim

where the X after Source is the drive letter that the ISO was given when you mounted it.  Be sure to leave all the other punctuation intact.

@amrenthebat  And this is with the installer you downloaded still mounted, as shown in a File Explorer window?

I'm sorry, but I don't really know how else to help here.  Windows won't let you repair it using any of the methods I know, and the only other approach I can think of is to do a clean install, as in, wipe the drive and start fresh.

You could try resetting the laptop instead, if you're able, but that would amount to the same thing except you'd start with a slightly older version of Windows rather than the newest one.  Either way, you'd be erasing all your data, although of course you could reinstall any apps (including Sims 4), and you could store your personal files on an external drive or in the cloud and restore them afterwards.