Dynamically switch from 64bit to 32bit powershell

Question

I have a script that needs to run in 32bit powershell. I want to, at run time, determine if it is running in 32 or 64 bit powershell, and if 64bit, switch dynamically to 32bit.

Basically the exact opposite of this.

if ($env:PROCESSOR_ARCHITEW6432 -eq "AMD64") {
write-warning "Y'arg Matey, we're off to 64-bit land....."
if ($myInvocation.Line) {
    &"$env:WINDIR\sysnative\windowspowershell\v1.0\powershell.exe" -NonInteractive -NoProfile $myInvocation.Line
}else{
    &"$env:WINDIR\sysnative\windowspowershell\v1.0\powershell.exe" -NonInteractive -NoProfile -file "$($myInvocation.InvocationName)" $args
}
exit $lastexitcode
}

But for some reason I can not figure out how to reverse this. Please help.

You're expecting us to leave this site and go somewhere else in order to see what you're asking, which is not how this site works. Post the code you've tried that isn't working for you here, in the question itself, and then ask a specific question related to that code. — Ken White, May 24 '17 at 17:43
You might find [this StackOverflow question](https://stackoverflow.com/questions/8588960/determine-if-current-powershell-process-is-32-bit-or-64-bit) useful. — Jeff Zeitlin, May 24 '17 at 17:46
@KenWhite I was not aware this was against the rules. I am sorry to have inconvenienced you so greatly. — Thomas, May 24 '17 at 17:48
Aside from that, what problem are you trying to solve by doing this? — Bill_Stewart, May 24 '17 at 18:11
I am using Microsoft.Jet.OLEDB.4.0 which requires a 32bit environment. I am performing the check at the beginning of the script to automatically switch to the appropriate environment (if it is not already). — Thomas, May 25 '17 at 11:57

score 3 · Answer 1 · 2017-05-24T19:08:12.780

The 32-bit version of PowerShell on a 64-bit system resides in

$env:WINDIR\syswow64\windowspowershell\v1.0\powershell.exe

So test if running on a 64-bit system:

if ([Environment]::Is64BitProcess) {
  write-warning "Switching to 32-bit.PowerShell."
  if ($myInvocation.Line) {
    &"$env:WINDIR\syswow64\windowspowershell\v1.0\powershell.exe" -Non -NoP -NoL $myInvocation.Line
  }else{
    &"$env:WINDIR\syswow64\windowspowershell\v1.0\powershell.exe" -Non -NoP -NoL -file "$($myInvocation.InvocationName)" $args
  }
  exit $lastexitcode
}

Thomas · Answer 2 · 2017-05-24T18:42:51.893

0

if([IntPtr]::size -eq 8) {
    Write-Host "Switching to 32bit..."
    if ($myInvocation.Line) {
        &"$env:WINDIR\SysWOW64\windowspowershell\v1.0\powershell.exe" -NonInteractive -NoProfile $myInvocation.Line
    }else{
        &"$env:WINDIR\SysWOW64\windowspowershell\v1.0\powershell.exe" -NonInteractive -NoProfile -file "$($myInvocation.InvocationName)" $args
    }
    exit $lastexitcode
}

edited May 24 '17 at 18:42

answered May 24 '17 at 18:22

Thomas

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Dynamically switch from 64bit to 32bit powershell

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