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I usually look at the event log to find out at what time I switched on my computer. I look for the entry saying "The Event Log service was started". I use this to record in-out times at office. These days, I usually hibernate my computer instead of shutting it down. Now, the event log does not record an event when the machine is switched on (and rightly so).

How do I find out at what time the computer was switched on when it has booted out of hibernation?

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2 Answers 2

Assuming that you have the Event Log enabled,
Check the System Log events after a restore from hibernation.
You will find a series of events

  • First will be the Event Log itself starting again
  • This will be followed by System Control Manager events starting services again.

The timestamp for these events would help you identify the exact time you came out of hibernation. Once you know this pattern, it can be used any time in future.

Some notes.

  1. You can reach the Event Logs through: Start ==> Administrative Tools ==> Event Viewer
  2. You might want to increase the log file size if you want to retain events too far back in time (but, usually your last hibernation would not be too far back in time)
  3. You can export the event log in various formats (CSV, TXT, EVT) to search through them later
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Thsi works for me: start a command prompt and run net statistics workstation. The first thing returned is the start time.

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He needs the time he came out of hibernation, not boot time. For that you could just use systeminfo | findstr "Up Time:" – John T Aug 24 '09 at 6:18
Sorry, I misunderstood the question. – alex Aug 24 '09 at 6:30
John T, even systeminfo gives me the time since the last full boot instead of the time since it came out of hibernation. – Agnel Kurian Aug 24 '09 at 9:35
I know, that's what I said... If it worked for hibernation time I would have answered with it. – John T Aug 24 '09 at 15:34

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