Home / Questions / 435873
Accepted
VewixxPlayer YT
Asked: 2022-03-17 04:12:29 +0800 CST 2022-03-17 04:12:29 +0800 CST

How to get the latest windows update date with PowerShell in string format?

  • 772

I'm trying to get the last windows update date from PowerShell, and I want to save it in a windows variable as text, so I can use it in future statements.

I have tried this method, which can be found in various forums and tutorials. However, it saves it as type Object, and X number of characters cannot be subtracted from it.

(New-Object -com "Microsoft.Update.AutoUpdate").Results|fl

I want to be able to extract certain characters from the text printed after that command, or directly get just the date so I can use it in a text declaration.

powershell

1 Answers

  1. Best Answer

    Here I explain how you can do it step by step

    1 - Access the value you are looking for:

    $lastUpdate = (New-Object -com "Microsoft.Update.AutoUpdate").Results.LastInstallationSuccessDate

    In this way you have created a variable that returns the date of the last installation.

    $lastUpdate
>> martes 16 marzo 2021 08:23:13 AM

    But the content of the variable lastUpdateis still of type DateTime and not of type String.

    $lastUpdate.GetType().Name
>> DateTime

    2 - To convert it to string you must do the following:

    $lastUpdateSTR = $lastUpdate.ToString("yyyy/MM/dd")

    If we check the variable and we will see that it was converted correctly.

    $lastUpdateSTR
>> 2021/03/16

$lastUpdateSTR.GetType().Name
>> String

    Note that ToString("yyyy/MM/dd")allows you to specify the format.

    "yyyy - MM - dd"
>> 2021 - 03 - 16

"yy - MMM - dddd"
>> 21 - mar - martes

"yyyy - MMMM - ddd"
>> 2021 - marzo - mar

    In conclusion what you are looking for can be done with this line

    $lastUpdate = (New-Object -com "Microsoft.Update.AutoUpdate").Results.LastInstallationSuccessDate.ToString("yyyy/MM/dd")

    Returns the string:

    $lastUpdate
>> 2021/03/16
    • 3