Any way to know when Windows 10 was installed? (not upgraded)

rodion15 said:

The command "systeminfo | find "Original Install Date" shows the time Windows was last upgraded. Any way to know when Windows 10 was installed?

Any help much appreciated.

Open Powershell as admin and copy paste this whole thing... then hit ENTER.

$OS=@(Get-ChildItem -Path HKLM:\System\Setup\Source* | ForEach-Object {Get-ItemProperty -Path Registry::$_}; Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion')
$OS | Select-Object ProductName, ReleaseID, CurrentBuild, @{Name='InstallDate'; Expression={[timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($_.InstallDate))}} | Sort-Object "InstallDate"



This is the only way I can find, that goes past the upgrade dates. I just tested it. It works.
I used it on Win 11 which I had upgraded to from Windows 10. It showed the Windows 10 install date.


Run from Windows 11... the YELLOW dot shows the date I installed Windows 10....





The only "clean" install I ever did was the Windows 10 install in May 2020.
I did an In-Place Upgrade from Win 10 to Win 11.

The July 2020 date was when I did an In-Place Upgrade from 1909 to 2004 on Windows 10.
The October 2022 date is when I did an In-Place Upgrade from 21H2 to 22H2 on Windows 11.

Ghot said:

$OS=@(Get-ChildItem -Path HKLM:\System\Setup\Source* | ForEach-Object {Get-ItemProperty -Path Registry::$_}; Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion')
$OS | Select-Object ProductName, ReleaseID, CurrentBuild, @{Name='InstallDate'; Expression={[timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($_.InstallDate))}} | Sort-Object "InstallDate"

Mike,

I agree.
And the list will include Repair install dates-times.

And you could save it straight to a file on the user Desktop by adding an Export-csv to it -

Code:

$OS=@(Get-ChildItem -Path HKLM:\System\Setup\Source* | ForEach-Object {Get-ItemProperty -Path Registry::$_}; Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion')
$ThisDesktop=(Get-ItemProperty -Path "HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" -Name "Desktop").Desktop
$OS | Select-Object ProductName, ReleaseID, CurrentBuild, @{Name='InstallDate'; Expression={[timezone]::CurrentTimeZone.ToLocalTime(([datetime]'1/1/1970').AddSeconds($_.InstallDate))}} | Sort-Object "InstallDate" | Export-CSV "$ThisDesktop\ListWindowsHistory-Install-VersionUpdate-RepairInstall.csv" -NoTypeInformation

All the best,
Denis

rodion15 said:

That worked like a charm on both my Windows 10 Pro and Windows 10 home PCs. Thanks!

Find Windows 10 Original Install Date and Time