Showing a slightly safer way to install PowerShell instead of using IEX though still brings the same similar problems as IEX does

Install-PS-No-IEX.ps1

$wr = invoke-webrequest https://raw.githubusercontent.com/PowerShell/PowerShell/master/tools/install-powershell.ps1

$sbuilder = [System.Text.StringBuilder]::new()
$sbuilder.AppendLine('function Install-ps {'}
$sbuilder.AppendLine($wr.content)
$sbuilder.AppendLine('}')
$sbuilder.AppendLine('')
$sbuilder.AppendLine('Install-ps -UseMSI -Preview')  #Replace this with whatever switches you want to run instead from the ones available in the above script
$nsb = [Scriptblock]::Create($sbuilder.ToString())
. $nsb

Error Line 4 -> Replace } with )