This script allows you to enable and disable your proxy settings quickly in case you work from two different locations like your home office and a workplace where they require you to use a proxy.

ProxyProxyDance.ps1

$internetSettings = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings";

# Determines the current state of the proxy
function Get-ProxyState() {
  $settings = Get-ItemProperty -Path $internetSettings;
  return $settings.ProxyEnable;
}

# Enables the proxy.
# IMPORTANT: Change the defaults to something that is useful to you!
function Enable-Proxy(
      [String] $ProxyServer = "",
      [String] $ProxyScript = "",
      [String] $ProxyOverrides = "") {

  $proxyState = Get-ProxyState

  if($proxyState -eq 0) {
    Write-Host "Proxy was not enabled, enabling it."

    Set-ItemProperty -Path $internetSettings -Name ProxyServer -Value $ProxyServer
    Set-ItemProperty -Path $internetSettings -Name AutoConfigURL -Value $ProxyScript
    Set-ItemProperty -Path $internetSettings -Name ProxyOverride -Value $ProxyOverrides
    Set-ItemProperty -Path $internetSettings -Name ProxyEnable -Value 1

    # Also update the environment variables to the right setting.
    # This enables tools like GIT and NPM to use the proxy.
    $env:HTTP_PROXY = "$proxyServer"
    $env:HTTPS_PROXY = "$proxyServer"
  }
}

# Disables the proxy everywhere
function Disable-Proxy() {
  $proxyState = Get-ProxyState

  if($proxyState -eq 1) {
    Write-Host "Proxy was enabled, disabling it."

    # Disable the proxy and remove the auto configure script.
    # Otherwise it is partially enabled.
    Set-ItemProperty -Path $internetSettings -Name ProxyEnable -Value 0
    Set-ItemProperty -Path $internetSettings -Name AutoConfigURL -Value ""
    Set-ItemProperty -Path $internetSettings -Name ProxyOverride -Value ""

    # Remove the proxy environment variables so that tools like GIT and NPM
    # won't complain about the proxy being unreachable.
    $env:HTTP_PROXY = $Null
    $env:HTTPS_PROXY = $Null
  }
}

# Toggles the proxy in Windows
function Toggle-Proxy() {
  $proxyState = Get-ProxyState

  if($proxyState -eq 0) {
    Enable-Proxy
  }
  else {
    Disable-Proxy
  }
}