Windows last boot time

on January 29, 2012

systeminfo | findstr /C:"System Boot Time"

systeminfo | findstr /C:"System Up Time"

c:\>systeminfo | findstr /C:"System Boot Time"
System Boot Time:          1/29/2012, 4:54:04 PM

c:\>wmic os get lastBootUpTime
LastBootUpTime
20120129165404.109999+330
c:\>

You’ve come to the right place if you want to learn about different ways to check the last boot time of the windows machine.

Network administrators use Windows last boot time as a metric to troubleshoot day-to-day issues that may arise in the system.

Let’s start by looking at a couple of different methods to identify the Windows last boot time.

Power Shell

There are some ways to utilize Power Shell to check your Windows machine’s uptime or last boot time.

Get-CimInstance cmdlet

The Get-CimInstance cmdlet in PowerShell can be used to obtain the system’s most recent boot time.

Get-CimInstance cmdlet (instances of WMI classes) gets system information from the win32 operating system class name and provides it to the second instruction via the pipeline operator. It obtains a class’s CIM (Common Information Model ) instances from a CIM server.

The second command chooses the CSName and lastBootupTime properties from CIM and displays the windows machine’s last boot time as a result.

First, Open the PowerShell and run it as an administrator.

Just type the following command in the PowerShell to view the last boot time.

Get-CimInstance -ClassName win32_operatingsystem | select csname, lastbootuptime

Sample Output:

PS C:\Users\geekflare> Get-CimInstance -ClassName win32_operatingsystem | select csname, lastbootuptime

csname          lastbootuptime
------          --------------
LAPTOP-9A5G7BR4 2/20/2022 1:26:40 PM

The below gcim command displays the uptime of a windows system in a list manner with days, hours, and minutes. Instead of the last boot time, it just shows the uptime of a system since the last boot.

(get-date) - (gcim Win32_OperatingSystem).LastBootUpTime

Here, gcim stands for Get – CimInstance.

Sample Output:

PS C:\Users\geekflare> (get-date) - (gcim Win32_OperatingSystem).LastBootUpTime


Days              : 7
Hours             : 8
Minutes           : 44
Seconds           : 38
Milliseconds      : 884
Ticks             : 6362788845605
TotalDays         : 7.36433894167245
TotalHours        : 176.744134600139
TotalMinutes      : 10604.6480760083
TotalSeconds      : 636278.8845605
TotalMilliseconds : 636278884.5605

If you’re using PowerShell 6 or above, you can get the Windows uptime and last boot time easily with the following command:

Get-Uptime -Since

To see all the properties and methods of Get-CimInstance, use the following command.

Get-CimInstance Win32_OperatingSystem | Get-Member

This command provides the info of all the Get-CimInstance methods and their properties.

Get-WmiObject

You can easily query the last boot time for your PC using the PowerShell Get-WmiObject command, as shown below.

(Get-WmiObject Win32_OperatingSystem).LastBootUpTime

Sample Output:

PS C:\Users\geekflare> (Get-WmiObject Win32_OperatingSystem).LastBootUpTime
20220220132640.500000+330

You’ll see an output that appears awkward at first, but it’s not difficult to read and understand. You can easily figure out the last boot time of your windows machine.

The information below can be used to break down the LastBootUpTime 20220220132640.500000+330.

• Year: 2022.
• Month: 02.
• Day: 20.
• Hour: 13.
• Minutes: 26.
• Seconds: 40.
• Milliseconds: 500000.
• GMT: +330 (5 and half hours ahead of GMT).

Or you can also use another Get-WmiObject command to query the last boot time of the system.

Get-WmiObject win32_operatingsystem | select csname, @{LABEL='LastBootUpTime';EXPRESSION={$_.ConverttoDateTime($_.lastbootuptime)}}

The lastbootuptime will be converted into big integer format, which will be finally displayed in a readable format.

Sample Output:

PS C:\Users\geekflare> Get-WmiObject win32_operatingsystem | select csname, @{LABEL='LastBootUpTime';EXPRESSION={$_.ConverttoDateTime($_.lastbootuptime)}}

csname          LastBootUpTime
------          --------------
LAPTOP-9A5G7BR4 2/20/2022 1:26:40 PM

Network statistics workstation

The net statistics command displays system statistics such as bytes of data received and total uptime since the computer’s last boot.

net statistics workstation | select-string "Statistics"

You can also use the following shortcut:

net stats work | select-string "Stat"

Sample Output:

PS C:\Users\geekflare> net statistics workstation | select-string "Statistics"

Workstation Statistics for \\LAPTOP-9A5G7BR4
Statistics since 2/20/2022 1:28:32 PM

System Info

The systeminfo utility command can be used to obtain the computer’s most recent boot time by loading and analyzing processor, Hotfix, and Hyper-V information.

systeminfo

This command displays the Hostname, OS version, build-type, configuration, bios version, boot time, software installation date, and every detail.

From all this data, if you want to see only the specific required data, Then you need to pass the Select -string additional utility to the systeminfo command.

Just type the following command in the PowerShell terminal to see the last boot time.

systeminfo | Select-String "OS version","System Boot Time"

Here, the Select-String cmdlet searches input strings and files for text patterns using regular expression matching.

The above command fetches the local computer’s most recent reboot time and prints the OS version of a system and windows system last Boot Time to the terminal, as shown below.

Sample Output:

PS C:\Users\geekflare> systeminfo | Select-String "OS version","System Boot Time"

OS Version:                10.0.22000 N/A Build 22000
System Boot Time:          2/20/2022, 1:26:40 PM
BIOS Version:              Insyde F.18, 3/15/2019

Command prompt

You can also use the command line to check the uptime or last boot time of your Windows system with some commands and utilities like net stats, wmic, and systeminfo. 

System Info

The command systeminfo displays generic information about the Windows operating system and its configuration. It displays the last time Windows was booted. If you want uptime, you need to manually determine how much time has passed since the last boot.

Open a command prompt and type the following command.

systeminfo | find "System Boot Time"

Sample Output:

C:\Users\geekflare>systeminfo | find "System Boot Time"
System Boot Time: 2/20/2022, 1:26:40 PM

WMIC

 WMIC ( Windows Management Instrumentation Command-line ) command will provide you with a string representation of the computer’s last boot time. The result is formatted as a four-digit year with two digits for month, day, hour, minute, and second.

Open a command prompt and type the following command.

wmic path Win32_OperatingSystem get LastBootUpTime

Sample Output:

C:\Users\geekflare>wmic path Win32_OperatingSystem get LastBootUpTime
LastBootUpTime
20220220132640.500000+330

This output can be read as 2022, month 2, day 20, hour 13 (or 1:00 PM), minute 26, and so on.

Net Stats

The net statistics command displays system statistics such as bytes of data received, bytes of data transferred, the number of connections made, and total uptime since the last boot of the computer.

To see the services running in the windows machine, use the below command.

net stats

This command just displays the available running services in the system.

We can get statistics for either the server or workstation using the context NET STATISTICS with the following command.

net stats workstation

Here, I provided the workstation in command to see statistics.

Sample Output:

C:\Users\geekflare>net stats workstation
Workstation Statistics for \\LAPTOP-9A5G7BR4


Statistics since 2/20/2022 1:28:32 PM


  Bytes received                               66780
  Server Message Blocks (SMBs) received        18
  Bytes transmitted                            63746
  Server Message Blocks (SMBs) transmitted     0
  Read operations                              0
  Write operations                             0
  Raw reads denied                             0
  Raw writes denied                            0

  Network errors                               0
  Connections made                             0
  Reconnections made                           0
  Server disconnects                           0

  Sessions started                             0
  Hung sessions                                0
  Failed sessions                              0
  Failed operations                            0
  Use count                                    10
  Failed use count                             0

The command completed successfully.

This command can be used from within a batch file, and the output can be filtered using the “find” command. For example, if you want to find only the last boot time of the system, use the following command.

net statistics workstat

Sample Output:

C:\Users\geekflare>net statistics workstation | find "Statistics"
Workstation Statistics for \\LAPTOP-9A5G7BR4
Statistics since 2/20/2022 1:28:32 PM

And if you want to find the Windows Server uptime, the command will become the net statistics server.

Task Manager

This is the simplest way to check your device uptime. Instead of showing the last boot time, it shows the uptime of the system since the last boot.

• To open Task Manager, simply use the Ctrl + Shift + Esc keyboard shortcut. 
• Navigate to the Performance tab. 
• The system uptime will be displayed near the bottom of the window.

Картинка с сайта: geekflare.com

This means the system was rebooted before 8 days, 8 hours, and 29 minutes.

Conclusion

These are some of the methods for quickly obtaining the windows system’s most recent boot time or uptime.

Every command has its own set of benefits. You can choose the way that best matches your needs.

I hope you found this article very useful in learning how to get the last boot time of a windows system in different ways.

You may also be interested in learning about the top tools to monitor windows servers.

В этой статье мы покажем, как получить время непрерывной работы компьютера (uptime), которое прошло с момента загрузки Windows.

Самый простой способ получить время последней загрузки Windows – выполнить команду:

systeminfo | FIND "System Boot Time"

System Boot Time: 3/11/2023, 11:58:45 AM

Картинка с сайта: vmblog.ru

Также время загрузки можно получить так:

net statistics workstation

Чтобы получить не просто дату загрузки, а время непрерывной работы с последней загрузки можно воспользоваться таким скриптом PowerShell:

$WinOS = Get-WmiObject Win32_OperatingSystem
write-host $WinOS.LastBootUpTime
(Get-Date) — $WinOS.ConvertToDateTime($WinOS.LastBootUpTime)

В этом примере компьютер Windows работает без перезагрузок 26 дней.

В этом примере командлет Get-WmiObject используется для обращения к классу Win32_OperatingSystem.

В PowerShell Core вместо командлета Get-WmiObject нужно использовать Get-CimInstance:

Get-CimInstance -ClassName win32_operatingsystem -ComputerName localhost| select csname, lastbootuptime

или

(get-date) - (gcim Win32_OperatingSystem).LastBootUpTime

Также в PowerShell Core 6.x и 7.x доступен новый командлет Get-Uptime, который сразу выводит Uptime (вычисляет TimeSpan между текущим временем и временем последней загрузки Windows):

Get-Uptime
Get-Uptime -Since

Вы можете получить uptime с удаленных компьютеров из командной строки.

Можно подключиться к удаленному компьютере через systeminfo и получить BootTime:

SystemInfo /s msksrv01 | find "Boot Time:"

Или через CIM получить время непрерывной работы удаленного компьютера:

(Get-Date) - (Get-CimInstance Win32_OperatingSystem -ComputerName msksrv01).LastBootupTime

Либо можно проверить время загрузки сразу несколько удаленных хостов Windows с помощью PowerShell (имена серверов указываются через запятую):

Get-CimInstance win32_operatingsystem -computerName server1,server2,server3 | select-object csname,LastBootUpTime

There are several ways to find out how long Windows has been running (uptime) since the last boot.

You can use the Task Manager GUI to view the total Windows uptime.

1. Open the Task Manager (run the taskmgr.exe command or press the Ctrl+Shift+Esc)
2. Go to the Performance tab -> select CPU
3. Check the Up time value

You can also get the last boot time of the computer by using the command:

systeminfo

System Boot Time is the time Windows was last restarted (booted).

In this case, only the last boot time is displayed at the command prompt. To calculate the uptime value as the difference between the current time and the Windows boot time, use the following PowerShell commands:

$boot_time = Get-CimInstance Win32_OperatingSystem | select LastBootUpTime
(Get-Date) - $boot_time.LastBootUpTime | select Days,Hours,Minutes,Seconds

The commands will return the computer’s uptime value in days and hours.

In the new PowerShell Core 6.x and 7.x versions, the new Get-Uptime cmdlet can be used to check the system uptime. This cmdlet returns the uptime value in days, hours, and minutes (in TimeSpan format). Or view the last Windows boot time

Get-Uptime -Since

You can get uptime from a remote computer:

$remotePC='hqpc12b23'
(Get-Date) - (Get-CimInstance Win32_OperatingSystem -ComputerName $remotePC).LastBootupTime

This command can be used to remotely query the uptime of multiple computers in an AD domain. The Get-ADComputer cmdlet is typically used to get a list of domain-joined computers.

Note that on desktops running Windows 10 and 11, the hybrid boot feature (Fast Startup) is enabled by default. In this mode, when the user turns off the computer, Windows does not power off the device, but instead unloads the kernel and drivers into a hibernation file. In this case (as well as after waking from sleep or hibernation), the computer’s uptime is not reset after it is powered on.