Oumie-x You're probably still getting BlueScreens, but the system is shutting down too quickly for you to catch the error codes. What was the boot error that was fixed? It's possible it's not entirely fixed, as in, it's still affecting your system, just in a slightly less drastic way.
It's strange though that you're not getting logs from the game crashing, or at least that the Reliability Monitor isn't picking them up. Let's see if we can find this info another way. Click Windows key-R and copy and paste this:
%LocalAppData%\CrashDumps
When you enter, you'll see a list of .dmp files. If one of them is from Sims 4 or the EA App, please upload it to a third-party filehosting site (Google Drive, Dropbox, etc.) and link it here. If you see a crash dump that was written at exactly the time the game crashed, I'd like that too. But in either case, please only upload a new file, as in, one associated with the last crash you had or the next one.
If there is no Sims 4 .dmp file, you can enable them:
- Hit the Windows key, type "command prompt" in the box, right-click on Command Prompt in the search results, and select Run as Administrator
- In the window, paste "reg add "HKLM\Software\Microsoft\Windows\Windows Error Reporting\LocalDumps\devenv.exe" /v DumpType /d 2 /t REG_DWORD" without the outside quotes into the box, and enter
- Launch Sims 4 and wait for it to crash (whether you can play at all or not)
- After it crashes, wait for any crash dialogs to finish
- Then hit Windows key-R and paste "%LOCALAPPDATA%\CrashDumps" without quotes into the box, and enter
- Upload the last .dmp file to a free filesharing site and link it here
- When you want to undo the auto crash log dumps, open Command Prompt as before, paste "reg delete "HKLM\Software\Microsoft\Windows\Windows Error Reporting\LocalDumps" /f" without the outside quotes, and enter.