Determine the last boot time of a Windows Server

In this article, we shall discuss the steps to Determine the last boot time of a Windows Server. This can be achieved by viewing the Kernel Boot information via the Windows event log. Kindly refer to these related guides: How to enable virtualization (VT-X) in VMWare workstation, how to install virtual machine Guest Addition, Linux Machine: Is it Virtual or a Physical server, how to install virtual machine Guest Addition,

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Steps to view the Last Reboot Time via the Command Line

In order to determine various System boot times etc, lunch the command line tool can be used as an administrator. There are different ways to fire the CMD prompt.

• Search for “CMD” in the search menu or
• Search for “RUN” in the search menu or type cmd.exe

Or from the file explorer, search for cmd.exe. Next, copy and paste this command and hit enter

systeminfo | find "System Boot Time"

Or run the command below

systeminfo | find /i "Boot Time"

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See the Last Reboot Time via Windows Event Log

Determining the boot time via the Event Log After firing up the Windows Event Viewer Application

• Under Event Viewer (local)
• Expand the Applications and Services log
• Expand Microsoft
• Expand Windows
• Search for Kernel-Boot in the drop-down menu, expand and then click on Operation.

The boot time etc, will be displayed on the right pane as shown below.

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FAQs on the last boot time

Script to Automate the process of checking the last boot time of multiple Windows Servers?

The below PowerShell script can be used to query the last boot times for multiple servers. To do this use PowerShell Get-CimInstance cmdlet to query the Win32_OperatingSystem class on remote servers.

# Define a list of server names or IP addresses
$servers = @("Server1", "Server2", "Server3")

# Define an array to store the results
$uptimeResults = @()

# Iterate through the list of servers
foreach ($server in $servers) {
    # Use Try-Catch to handle errors in case the server is unreachable
    try {
        # Query the last boot time on the remote server
        $bootTime = Get-CimInstance -ComputerName $server -ClassName Win32_OperatingSystem | Select-Object LastBootUpTime

        # Calculate the uptime in days
        $uptime = (Get-Date) - $bootTime.LastBootUpTime

        # Create a custom object with server name and uptime
        $result = [PSCustomObject]@{
            ServerName = $server
            Uptime = $uptime.Days
        }

        # Add the result to the array
        $uptimeResults += $result
    }
    catch {
        # Handle any errors, such as when the server is unreachable
        Write-Host "Error connecting to $server: $_"
    }
}

# Display the results
$uptimeResults | Format-Table -AutoSize

I hope you found this blog post helpful on how to determine the last boot time of a Windows Server. If you have any questions, please let me know in the comment session.