###################################################################
##  Description:  Remotely enable WinRM on a remote machine in a very reliable and
##  efficient manner.  Because everything is done from the CMD window and all on one line
##  the worry of breaking your connection tot he PC when the firewall goes down is gone.
##  This script tells the remote PC to do everything.
##
##  This script is provided as is and may be freely used and distributed so long as proper
##  credit is maintained.
##
##  Written by: 
##  Date Modified:  01-06-14
###################################################################

$pc = Read-Host "Enter hostname"
$itworked = $true

# Lets make sure the PC is online before we try anything
$ping = new-object System.Net.NetworkInformation.Ping
$Reply = $ping.send($pc)
If ($Reply.Status -eq "Success") {
	# Ping was good so lets build the command line code that will be executed.  Thanks to the command lines
	# && operator we can string everything together and not have to worry as much about failures or timing
	# things just right.  Each one only executes if and after the one before it was successful.
	$cmd = "cmd /c powershell enable-psremoting -force -skipnetworkprofilecheck && net stop WinRM && net start WinRM && net stop MpsSvc && net start MpsSvc"
	Write-Host -foregroundcolor yellow "`n[Invoking WMI Command]"
	Try {
		# We'll invoke WMI to create a process and pass it the command line string we created.
		# I change it's error action to stop so that I can catch it later, by default it's not a terminating error
		$invoke = Invoke-WmiMethod -class Win32_process -name Create -ArgumentList $cmd -ComputerName $pc -ErrorAction Stop -ErrorVariable $errors
	}
	Catch {
		Write-Host -foregroundcolor red "Unable to execute remote WMI function.  Make sure Remote WMI is enabled in the remote PC's firewall."
		$itworked = $false
	}
	If ($itworked) {
		Write-Host -foregroundcolor yellow "[WMI Successfuly Invoked]"
		Write-Host "Process may take up to 60 seconds to complete after function ends"
	}
}
Else {
	Write-Host -foregroundcolor red "$pc is offline."
}
"`n"