Mark all paths in Windows path variables (user & system) as existing (green) or non-existing (red). Used for when path variable exceeds 2047 characters.

Mark-Path-Variables.ps1

# This script color-codes all paths within the user and system "Path" variables in Windows,
# mainly to handle when your path variables are deemed as too long (i.e. over 2047 characters
# long) and your uninstalled programs didn't properly clean up.

# Source: https://www.askwoody.com/forums/topic/clean-your-path/#post-2443639

Clear-Host
foreach ($path in ((get-childitem -path env:\path | Select -exp Value).split(";"))) {
  if ($path -ne "") {
    If (Test-Path $path) {
      Write-host "True  - $path" -ForegroundColor Green
    } else {
      Write-host "False - $path" -ForegroundColor Red
    }
  }
}