Author Posts

January 1, 2012 at 12:00 am

by jeg at 2013-03-27 14:47:16

Running below from here:
http://gallery.technet.microsoft.com/sc ... dd84bc6239
< #
.SYNOPSIS
This script gets a system installation date.
.DESCRIPTION
This script uses WMI to get a system installation date.
.INPUTS
You can enter a list of computernames as a parameter.
The defaut is the current computer.
The script accepts input from the pipeline.
.OUTPUTS
An object containing Computer and InstallDate properties.
.NOTES
File Name : Get-SystemInstallDate.ps1
Author : Robert van den Nieuwendijk
Twitter : rvdnieuwendijk
Requires : PowerShell Version 2.0
.LINK
This script is posted to Microsoft TechNet Script Center Repository:
http://gallery.technet.microsoft.com/Sc ... ter/en-us/
.EXAMPLE
C:\PS>.\Get-SystemInstallDate.ps1
Retrieves the installation date from the current system.
.EXAMPLE
C:\PS>.\Get-SystemInstallDate.ps1 -ComputerName server1,server2
Retrieves the installation date from server1 and server 2.
.EXAMPLE
C:\PS>"server1","server2"| .\Get-SystemInstallDate.ps1
Retrieves the installation date from server1 and server 2.
#>

param ([Parameter(ValueFromPipeline=$true)][string[]] $ComputerName = '.')

begin {
function Get-SystemInstallDateForOneSystem {
param ([string] $ComputerName = '.')
$Report = "" | Select-Object -property Computer,InstallDate
$Report.Computer = $ComputerName
$Report.InstallDate = [datetime] (Get-WmiObject -Class Win32_OperatingSystem -ComputerName $ComputerName).InstallDate
$Report
}
}

process {
if ($ComputerName -is [array]) {
$ComputerNames = $ComputerName
foreach ($ComputerName in $ComputerNames) {
Get-SystemInstallDateForOneSystem -ComputerName $ComputerName
}
}
else {
Get-SystemInstallDateForOneSystem -ComputerName $ComputerName
}
}

Gives me this:

Cannot convert value "20121211102032.000000-480" to type "System.DateTime". Error: "String was not recognized as a valid
DateTime."
At C:\Users\admin\Desktop\PS\GetInstallDate.ps1:38 char:3
+ $Report.InstallDate = [datetime] (Get-WmiObject -Class Win32_OperatingSystem – ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvalidCastParseTargetInvocationWithFormatProvider

by ps_gregg at 2013-03-28 17:22:18

Hi Jeg,

WMI handles dates differently and you will need to use the ConvertToDateTime Method of the WMI object.
I recommend that you change line #38

$Report.InstallDate = [datetime] (Get-WmiObject -Class Win32_OperatingSystem -ComputerName $ComputerName).InstallDate
Change it to

$os = Get-WmiObject -Class Win32_OperatingSystem -ComputerName $ComputerName
$Report.InstallDate = [datetime]$os.ConvertToDateTime($os.InstallDate)

Hope that helps.

-Gregg