wusa c:temphotfixname.msu /quiet /norestart

import-module ActiveDirectory

$AllPCs = Get-ADComputer -SearchBase "Appropriate OU Here" -filter *

$AllPCs | Foreach {
Invoke-Command -ComputerName "$($_.name)" -AsJob -ScriptBlock {
        if (!(Get-HotFix -id hotfixkb)) { CMD /C "wusa.exe c:temphotfixname.msu /quiet /norestart" }
    }
 }