Right-click on the Taskbar, and click Task Manager.

In Task Manager, select the Performance tab.

The current system uptime is shown under System.

Method 2

Click Start, type the following command and press ENTER:

cmd /k systeminfo | find "System Boot Time"

System uptime data is shown in the output, as below:

System Boot Time: 3/25/2007, 2:48:56 PM



Method 3

The hours of work (Microsoft) is a simple instruction to analyze a single server availability and reliability of the information. Local or remote operation. In its simplest form, this tool is the current system is working time is displayed. Advanced Options' access to more information, such as the number of operating systems to shutdown and restart the collision occurred, and install the service pack.

Download uptime.exe from here, and save it to a folder (say D:\Utils).
Open an elevated Command Prompt window. To open an elevated Command Prompt, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.

Run the uptime.exe utility (D:\Utils\uptime.exe)
Here is a sample output returned by the uptime.exe tool:

\\<Computername> has been up for: 0 day(s), 0 hour(s), 4 minute(s), 52 second(s)