Is there a log of any system actions like logins, file deletion, etc?

If my PC did not require a password to reach desktop, is there a log or something that captures a snapshot of what time the PC was on, what folders were deleted, etc ?


Reason I am asking this is because there are significant data loss on some drives but I cannot be sure whether it is due to wilful deletion or malware.

The event logs do show system startup and shutdown. To see when files or folders were deleted would require file and folder auditing and by default it is not enabled. This must be very selective or performance would be impacted and the logs could consume a large amount of disk space in a short time.