Interesting... I downloaded a file from Microsoft some time back called uptime.exe... I think it was part of one of the resource kits, but they offer(ed) it as a FREE download. Don't know if they still have it or not.
UPTIME, Version 1.01
(C) Copyright 1999, Microsoft Corporation
That's what I get when I run "uptime /?" from the command prompt.
You should be able to still find it on Microsoft's site... if not, let me know and I can send it to you.
JW