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Is there an option in Windows that keeps track when your computer was last rebooted?

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2 Answers 2

up vote 8 down vote accepted

Just run cmd.exe with this command

systeminfo| find "System Boot Time"

For others solutions go to http://www.walkernews.net/2008/06/18/how-to-check-windows-last-boot-up-time/

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That's a nice little command - I'll have to remember that one. –  Majenko Mar 10 '11 at 10:19
    
thats fantastic! i actually changed my Right Answer vote to this one because it was so much quicker! Sorry Matt - hope you don't mind. You got in quickest and your answer was right, but his is just so much easier –  RoboShop Mar 10 '11 at 10:22
    
It's not accurate if your machine goes to sleep/hibernate. –  Mark Sowul Mar 14 '11 at 20:38

It will be in the event logs.

Fire up Event Viewer and select the System log from Windows Logs in the tree on the left.

There will be a lot of log entries in there, so click Filter Current Log... on the right and filter it for the Kernel-General log source only.

You will then find entries saying such things as:

The operating system started at system time ‎2011‎-‎03‎-‎09T00:04:30.375199800Z.

and

The operating system is shutting down at system time ‎2011‎-‎03‎-‎09T00:00:10.192212700Z.
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