Computer freezing completely while playing

@HowEmbarraSim  The dump file won't unzip for me for some reason, but I don't think it matters: it's much too small (59 bytes) to contain enough information to be useful.  Let's try another way instead.  You can tell Windows to create crash dumps, play until a freeze, then find the dump and upload it.  Here's how:

• 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 freeze or crash
• After it crashes, wait for any crash dialogs to finish (or restart if you need to)
• Then hit Windows key-R and paste "%LOCALAPPDATA%\CrashDumps" without quotes into the box, and enter
• Upload the last .dmp file to pastebin and drop a link here, as before
• 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

To be clear, this might not work with the kind of freeze you're seeing.  But it's difficult to tell without more information.  Regardless of whether you get a crash dump, please look again in C:\Windows\Minidump for any files created while you were playing.  If you find one that's at least a few hundred KB (up to several MB), please upload it.

If this doesn't work either, hardware monitoring would be an entirely different approach.  It won't catch software errors, but then again this might not be a software error.