4625: An account failed to log on
it documents each and every failed attempt to logon to the local computer regardless of logon type, location of the user or type of account.
event id 900 These are events associated with SPPSVC service startup An application may call SL API, will cause the service to wake up.
1003 The Windows Directory Service database could not be initialized and returned error <error code>. Unrecoverable error, the directory can't continue.
I would suspect you would get all of these on a freeze or power down anyway
What you need to know is why it powered down but without a BSOD error code it hard to tell
control panel >> system and security >> system >> advanced system settings >> startup and recovery settings >> untick 'auto restart' box
will stop windows from restarting on a BSOD