What is problem-take ownership and delete a file?

# Get the ID and security principal of the current user account
$myWindowsID=[System.Security.Principal.WindowsIdentity]::GetCurrent()
$myWindowsPrincipal=new-object System.Security.Principal.WindowsPrincipal($myWindowsID)

# Get the security principal for the Administrator role
$adminRole=[System.Security.Principal.WindowsBuiltInRole]::Administrator

# Check to see if we are currently running "as Administrator"
if ($myWindowsPrincipal.IsInRole($adminRole))
{
# We are running "as Administrator" -

}
else
{
# We are not running "as Administrator" - so relaunch as administrator

# Create a new process object that starts PowerShell
$newProcess = new-object System.Diagnostics.ProcessStartInfo "PowerShell";

# Specify the current script path and name as a parameter
$newProcess.Arguments = $myInvocation.MyCommand.Definition;

# Indicate that the process should be elevated
$newProcess.Verb = "runas";

# Start the new process
[System.Diagnostics.Process]::Start($newProcess);

# Exit from the current, unelevated, process
exit
}

# Run your code that needs to be elevated here
#takeown of files
takeown /f c:\FA30-Win7-setup.exe /d y
icacls c:\FA30-Win7-setup.exe /grant username:F /q

#takeown of folders
takeown /f c:\Users\Public\Documents\FaFiles30 /r /d Y
icacls c:\Users\Public\Documents\FaFiles30 /grant username:F /t /q

takeown /f c:\Program Files (x86)\FinAnal30 /r /d Y
icacls c:\Program Files (x86)\FinAnal30 /grant username:F /t /q

Remove-Item c:\FA30-Win7-setup.exe