$proxyAddress = "xxx.xxx.xxx.xxx"
$proxyPort = "xx"
$username = Read-Host -Prompt 'Enter your username'
$passwordSecure = Read-Host -Prompt 'Enter your password' -AsSecureString
$tmpPassword = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($passwordSecure)
$password = [System.Runtime.InteropServices.Marshal]::PtrToStringAuto($tmpPassword)
$serverString = "$proxyAddress`:$proxyPort"
Set-ItemProperty -Path $reg -Name ProxyServer -type String -Value $serverString
Set-ItemProperty -Path $reg -Name ProxyEnable -type DWORD -Value 1
Set-ItemProperty -Path $reg -Name ProxyUser -type String -Value $username
Set-ItemProperty -Path $reg -Name ProxyPass -type String -Value $password