powershell invoke-command not working, but psexec does - powershell

Question

I am trying to uninstall an old version of Flash on multiple PCs with a powershell script using the invoke-command cmdlet. The script runs without errors, but flash is never uninstalled. Here is what I am using:
$flash = get-content "C:\11.6.txt"
$flash | Foreach {
if (Test-Connection -ComputerName $_ -Count 1 -ErrorAction SilentlyContinue) {
Invoke-Command -ComputerName $_ -ScriptBlock {Start-Process cmd.exe "/c start /wait MsiExec.exe /X{346137E0-7160-403B-AD21-3FF01D25037B} /qn" -NoNewWindow}
Write-Host "Uninstall from $_ complete."}
else {
Write-Host "$_ is offline"
}
}
If I run the uninstaller via psexec it works fine:
start /wait msiexec.exe /X{346137E0-7160-403B-AD21-3FF01D25037B} /qn
I cannot for the life of me figure out why invoke-command won't work. I am relatively new to PowerShell so it could be something silly, but I can't figure it out.

Answer 1

When it comes to executing code on a remote computer i have never been successful with Invoke-Command. However, PSExec has been nothing but good to me.
Try something like this. I can't test at the moment but let me know if it works for you.
Note: Change the FilePath location to your PSExec.exe location.
Start-Process -FilePath "C:\PSExec.exe" -ArgumentList {"\\$ComputerNameHere CMD.exe '/C start /wait msiexec.exe /X{346137E0-7160-403B-AD21-3FF01D25037B} /qn'"}

Answer 2

Here is the code that ended up working for me:
$flashPuters = Get-Content "C:\11.8.800.txt"
foreach ($computer in $flashPuters)
{
if (test-Connection -ComputerName $computer -Count 1 -ErrorAction SilentlyContinue) {
& 'C:\PSTools\psexec.exe' #("\\$computer", 'msiexec.exe', '/X{BFBC6337-B7B9-4AEE-BC19-CA910EED755D}', '/qn')
"Uninstall complete for $computer" >> C:\11.8.800.log
}else {
"$computer is not online" >> C:\11.8.800.log
}
}
Thank you to #HiTech for helping me!