$s = New-PSSession -ComputerName (gc c:\computers.txt)
$Hotfix = 'KB976002'
$Results = Invoke-Command -Session $S -ScriptBlock {
$Result = Get-Hotfix -Id $Using:Hotfix
New-Object -TypeName psobject -Property @{ Installed = ($Result -ne $null) }
}
$Results| ft -autosize