read-host -assecurestring | convertfrom-securestring | out-file C:\Temp\mysecurestring.txt

Get-ADComputer -Filter 'Name -like "COMPUTERNAME"' -Properties * | ForEach-Object {
$comp1 = $_.name
$username = "$comp1\Administrator"
$password = cat C:\Temp\mysecurestring.txt | convertto-securestring
$cred = new-object -typename System.Management.Automation.PSCredential -argumentlist $username, $password

Invoke-Command -ComputerName $comp1 -Cred $cred -Scriptblock {
$usersChild = Get-ChildItem -Path "C:\Users" | Where { $_.Name -like 'USERNAME*'}

Write-Verbose "Additional Directory Cleanup - Removing $($usersChild.Name) on $env:COMPUTERNAME..."

Remove-Item -Path $($usersChild.FullName) -Recurse -Force -ErrorAction Stop

    }}