Awake - PowerShell script to keep computer running

Awake.ps1

Add-Type @"
using System;
using System.Runtime.InteropServices;
public static class Power {
    public const uint ES_CONTINUOUS      = 0x80000000;
    public const uint ES_SYSTEM_REQUIRED = 0x00000001;
    [DllImport("kernel32.dll", SetLastError=true)]
    public static extern uint SetThreadExecutionState(uint f);
}
"@

if ([Power]::SetThreadExecutionState(
        [Power]::ES_CONTINUOUS -bor [Power]::ES_SYSTEM_REQUIRED
    ) -eq 0) {
    throw "Failed: $([Runtime.InteropServices.Marshal]::GetLastWin32Error())"
}

Read-Host "Press Enter to allow sleep again"
[Power]::SetThreadExecutionState([Power]::ES_CONTINUOUS) | Out-Null