Run-Ps64.ps1

<#
    .SYNOPSIS
    Run a PowerShell command in the 64-bit host.

    .DESCRIPTION
    When called from a 32-bit host executable, the specified command block will be run using the 64-bit Powershell host.
    If called from a 64-bit host, the command is simply run in the current host.

    .PARAMETER CommandBlock
    Command block to execute.
#>
function Run-Ps64 {
param (
    [Parameter(Mandatory)] [ScriptBlock] $CommandBlock
)    
    # Check we are running in 32-bit
    If ($env:PROCESSOR_ARCHITECTURE -eq 'x86') {

        # Check 64-bit is available
        If ($env:PROCESSOR_ARCHITEW6432) {
            & "$env:SystemRoot\sysnative\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -NonInteractive -Command $CommandBlock
        } Else {
            Write-Error -Message 'OS is 32-bit only. 64-bit subsystem not available' -Category InvalidOperation
        }

    } Else {
        # Already running 64-bit, execute command natively
        & $CommandBlock
    }
}