XP/2K/2003: View uptime of Windows system
Contributed by qmchenry 
Tagged: Windows Want to know how long it has been since a Windows system was booted?
Using the following command will show the uptime of the system as well as other information:
net statistics workstation
Look for a line such as this near the top of the output:
Statistics since 8/27/2004 10:34 PM
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spanky said on October 7, 2008
… or you could just use the system up time counter, and have things logged to file at a predefined interval, without having to manually type a command every time you what an update.
ace said on October 15, 2008
this is excellent
thank u
Ahmad Kamal said on April 20, 2009
why start counting the days use the command systmeinfo and it will show you everything you really need.
Anonymous said on January 10, 2010
Make a uptime.cmd and add:
systeminfo | find “System Up Time:”
pause
Thats it, no mental algebra…
anon said on July 7, 2010
systeminfo is not available to win xp sp 2 home
Stalks said on July 17, 2010
Thanks for this, “net statistics workstation” works a treat :)
systeminfo doesn’t show uptime on Windows Server 2008 R2
systeminfo gives me an error of “invalid CLASS” on my Windows 7 x64.
DC said on November 22, 2011
Or you could download and use the Win 2000 uptime tool from Microsoft, it seems to work fine in Server 2003.