Yes there is a way to find out how long Windows XP has been up. In fact, this tip will work on Windows 2000 also.
There is a program that Microsoft distributes to do this very task. You can download it
here.
Networked users (or those with an ethernet based broadband connection) can also get Uptime information by clicking on the Local Area Connection status in your taskbar.
Note - this is for NETWORK uptime and may not accurately reflect actual system uptime.
There is a Real-Time version of Microsoft's Uptime monitor using Microsoft Visual Basic .NET for the x86 platform created by one of our users. You can download that
here.
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got feedback?by trparky 
last modified: 2005-03-05 11:08:13