Powershell script Stop process and proceed - powershell

Question

I have a script where i run the shutdown.exe command on a list of computers. The script works fine until it hangs for some reason.
Is there a way that i can "ctrl + c" the shutdown command and then proceed to the next PC.
here is what im using.
buttonRestartWorkstations_Click={
#TODO: Place custom script here
$online = $checkedlistbox1.CheckedItems | where { Test-Connection -
ComputerName $_ -Count 1 -Quiet }
$computercount = $online.Items.Count
$progressbar1.Maximum = $online.Count
$progressbar1.Step = 1
$progressbar1.Value = 0
foreach ($computer in $online)
{
$progressbar1.PerformStep()
shutdown -r -t $textbox3.Text -m $computer
Start-Sleep -s 1
}
$label2.Visible = $true
$label2.Text = "Selected Servers will reboot on the " + $textbox1.text

Answer 1

The Restart-Computer cmdlet would give you the ability to target multiple computers in parallel, without a problem on one computer affecting execution on others.
As you state, Restart-Computer is not an option for you because you want to have a delay before the restart is initiated on a given computer (which is what shutdown -r -t <secs> gives you; note that while Restart-Computer does have a -Delay parameter, its purpose is different).
If:
your target computers are set up for PowerShell remoting
and you can run your script elevated (with administrative privileges)
you can use Invoke-Command to target the computers in parallel and then locally run shutdown.exe on them (PSv3+ syntax):
$delay = $textbox3.Text
Invoke-Command -ComputerName $online {
shutdown -r -t $using:delay
"$(('FAILED to initiate', 'Successfully initiated')[$LASTEXITCODE -eq 0]) reboot on $env:COMPUTERNAME."
} | ForEach-Object { $progressbar1.PerformStep() }
Just like with your original code, execution on each target computer will return once the restart has been initiated, though execution will happen in parallel, and the responses received from the target computers are not guaranteed to be in input order.
If you wanted to verify and wait for successful restarts, more work would be needed.
Any errors are printed to the console in red and can later be examined in the $Error collection.
Note the primary purpose of "$(('FAILED to initiate', 'Successfully initiated')[$LASTEXITCODE -eq 0]) reboot on $env:COMPUTERNAME." is to unconditionally produce some (non-error) output on each computer, so that the ForEach-Object script block is invoked for each (shutdown produces no stdout output by default, and stderr output is not acted on by ForEach-Object).