Powershell To Fetch Patches Installed in Last 30 Days on Windows System

What is the need for this PowerShell script.

1. This script is needed when there is a discrepancy reported by vulnerability scan claiming that a set of windows systems are missing particular patch however the centralized patching tool is showing them as installed.
2. This script could be handy for auditors, control validator/tester to test if patches are installed periodically or to check recently patched dates etc.

Option 1

$cDate = Get-Date # Get the date 30 adys ago
$DaysAgo = $cDate.AddDays(-30) # Get all the Updates installed since 30 days ago
Get-HotFix | Where-Object {$_.InstalledOn -gt $DaysAgo}
$LastPatch = Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 1

Option 2

Get-CimInstance -Class win32_quickfixengineering | Where-Object { $_.InstalledOn -gt (Get-Date).AddDays(-30) }

Option 3

$Hosts = Get-Content -Path '.\hosts.txt'  #contains list of hosts

#For each of the hosts in that file, run a command to gather patches installed on those hosts

Invoke-Command -ComputerName $Hosts -ScriptBlock {

Get-HotFix | Where-Object {$_.InstalledOn -gt ((Get-Date).AddDays(-30))

} | Select-Object -Property PSComputerName, Description, HotFixID, InstalledOn

} | Format-Table -AutoSize

| Out-File -Encoding utf8 -FilePath '.\Recent_OS_Updates.txt'  -Append 

-ErrorAction SilentlyContinue