system up time only for xp professional edition
It boasts how long it can stay up. Whereas previous
versions of Windows were coy about how long they went
between boots, XP is positively proud of its stamina.
Go to the Command Prompt in the Accessories menu from
the All Programs start button option, and then type
'systeminfo'. The computer will produce a lot of
useful info, including the uptime. If you want to keep
these, type 'systeminfo > info.txt'. This creates a
file called info.txt you can look at later with
Notepad. (Professional Edition only).