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Because I encountered a lot of strugle to create some scheduled tasks on a Windows 2003 machine with PowerShell v2.0.

I used the function of Hugo Peeters (see the link) and then I encountered a problem to pass a task with a parameter between double quotes.

Create-ScheduledTask -ComputerName $Server -TaskName '`"Name`"' -TaskRun '`"C:\WINDOWS\system32\cscript.exe \`"C:\test script\script.vbs\`"`"' -Schedule "DAILY" -StartTime "08:00" -RunAsUser "$domain\$User" -RunAsPwd $Password -Days "*"

This is the only format I used that worked to create a scheduled task to start a vbscript or another task including a parameter.

Follow up:

[codespan]

# -----------------------------------------------------
# Creates a scheduled task
Function Create-ScheduledTask
{
 # '@ http://www.peetersonline.nl/index.php/powershell/managing-scheduled-tasks-remotely-using-powershell/ '@
 param(
  [string]$ComputerName = "localhost",
  [string]$RunAsUser = "System",
  [string]$RunAsPwd = "",
  [string]$TaskName = "MyTask",
  [string]$TaskRun = '"C:\Program Files\Scripts\Script.vbs"',
  [string]$Schedule = "Monthly",
  [string]$Modifier = "second",
  [string]$Days = "SUN",
  [string]$Months = '"MAR,JUN,SEP,DEC"',
  [string]$StartTime = "13:00",
  [string]$EndTime = "17:00",
  [string]$Interval = "60"
 )
 #$Command = "schtasks.exe /create /s $ComputerName /ru $RunAsUser /tn $TaskName /tr $TaskRun /sc $Schedule /mo $Modifier /d $Days /m $Months /st $StartTime /et $EndTime /ri $Interval /F"
 $Command = "schtasks.exe /create /s $ComputerName /ru $RunAsUser /rp $RunAsPwd /tn $TaskName /tr $TaskRun /sc $Schedule /st $StartTime /F"
 Invoke-Expression $Command
 Clear-Variable Command -ErrorAction SilentlyContinue
}
# -----------------------------------------------------

Create-ScheduledTask -ComputerName $Server -TaskName '`"Name`"' -TaskRun '`"C:\WINDOWS\system32\cscript.exe \`"C:\test script\script.vbs\`"`"' -Schedule "DAILY" -StartTime "08:00" -RunAsUser "$domain\$User" -RunAsPwd $Password -Days "*"

[/codespan]