No need to guess, the evidence is already there.

If the *.evt files are corrupted, you may encounter the error messages mentioned here. There are various reasons why the Event Viewer log files can be corrupted ...

A Blue Screen of Death (BSOD) that fails to create a memory dump file and leaves no trace in the Event Viewer is a frustrating scenario when trying to troubleshoot the issue. This absence of evidence ...

Task Manager is fine. These are better.