Find Windows System Uptime
To find out how long your computer has been on or the System Uptime in Windows 11/10/Server, use any of the following methods:
1] Using PowerShell
Open an elevated PowerShell prompt, type the following and hit Enter:
You will see the Boot-up times in days, hours, minutes, seconds and milliseconds. Here, you are using the Get-Date cmdlet to return the current date and time, and then subtracting the value of the LastBootUpTime property that comes from the Win32_OperatingSystem, says TechNet. GCIM is an alias for Get-CimInstance.
2] Using CMD
If you want to find out the Server Statistics, you can open an elevated CMD type the following and hit Enter: The first line ‘Statistics since‘ will show you the Windows uptime.
3] Using Task Manager
If you open Task Manager, under the Performance tab, you will see your computer Up time displayed there.
4] Using SystemInfo tool
The built-in SystemInfo tool lets you view the System Boot Time. It displays the date and time at which the computer booted. Want to know the Windows Installation Date to find out when Windows was installed on your computer?