$ErrorActionPreference = 'SilentlyContinue'
$Output = New-Object System.Collections.Generic.List[string]

$Output.Add('--- IDEA processes ---')
Get-Process -Name 'idea64','idea','jetbrains*' | Select-Object -ExpandProperty Path | ForEach-Object { $Output.Add($_) }

$Output.Add('--- Uninstall registry (IntelliJ) ---')
$keys = @(
  'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*',
  'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*',
  'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*'
)
foreach ($k in $keys) {
  Get-ItemProperty $k | Where-Object { $_.DisplayName -like '*IntelliJ*' -or $_.DisplayName -like '*JetBrains*' } | ForEach-Object {
    $Output.Add(($_.DisplayName + '  ver=' + $_.DisplayVersion + '  loc=' + $_.InstallLocation))
  }
}

$Output.Add('--- candidate install dirs ---')
$dirs = @(
  'C:\Program Files\JetBrains',
  "$env:LOCALAPPDATA\Programs",
  "$env:LOCALAPPDATA\JetBrains",
  'D:\Program Files\JetBrains',
  'D:\JetBrains',
  'D:\Program Files (x86)\JetBrains'
)
foreach ($d in $dirs) {
  if (Test-Path $d) {
    Get-ChildItem $d -Directory | Select-Object -ExpandProperty FullName | ForEach-Object { $Output.Add($_) }
  }
}

$Output.Add('--- any idea*.vmoptions found (search C: and D: roots shallow) ---')
foreach ($base in @('C:\','D:\')) {
  Get-ChildItem -Path $base -Filter 'idea*.vmoptions' -File -Recurse -Depth 4 -ErrorAction SilentlyContinue | Select-Object -ExpandProperty FullName | Select-Object -First 10 | ForEach-Object { $Output.Add($_) }
}

$Output -join "`r`n"