How to Check How Long Your Computer Has Been Up Running in Windows XP

1. Log in to your Windows XP computer.
2. Press the Start button and click 'Run.'
3. Type 'cmd' and press 'Enter.' A command prompt window appears.
4. Type the following command:Systeminfo | Find 'Up Time'
5. Press 'Enter.' The System Information utility is now gathering a number of pieces of information about your system. After a few moments, it will display the system's uptime on a new line of the console window.