Check for a hotfix on a remote Windows Server with WMI

 $KB = Read-Host -Prompt "Enter KB number: "  
 $computername = Read-Host -Prompt "Enter FQDN of Computer or IP"  
 $query = "select HotFixID from Win32_QuickFixEngineering"  
 $HotFixes = Get-WmiObject -Query $query -ComputerName $computername  
 $found = $false  
 foreach ($HotFix in $HotFixes)  
 {  
   #Write-Host $HotFix.HotFixID  
   if ($HotFix.HotFixID -eq $KB)  
   {  
     Write-Host "HotFix $KB installed"  
     $found = $true  
   }  
 }  
 if ($found -eq $false)  
 {  
   Write-Host "HotFix not found"  
 }  
 Clear-Variable $HotFixes