I would rather not use WMI due the integrity check.
This is what I have that does not work:
$tempdir = Get-Location
$tempdir = $tempdir.tostring()
$reg32 = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*"
$reg64 = "HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*"
if((Get-ItemProperty $reg32 | Select-Object DisplayName | Where-Object { $_.DisplayName -Like '*Microsoft Interop Forms*' } -eq $null) -Or (Get-ItemProperty $reg64 | Select-Object DisplayName | Where-Object { $_.DisplayName -Like '*Microsoft Interop Forms*' } -eq $null))
{
(Start-Process -FilePath $tempdir"\microsoft.interopformsredist.msi" -ArgumentList "-qb" -Wait -Passthru).ExitCode
}
It always returns false. If I switch it to -ne $null
it always returns true so I know it is detecting $null
output even though, I believe (but could be wrong), the Get-ItemProperty
is returning a result that should be counting as something other than $null
.
$tempdir = Get-Location
$tempdir = $tempdir.tostring()
$appToMatch = '*Microsoft Interop Forms*'
$msiFile = $tempdir+"\microsoft.interopformsredist.msi"
$msiArgs = "-qb"
function Get-InstalledApps
{
if ([IntPtr]::Size -eq 4) {
$regpath = 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'
}
else {
$regpath = @(
'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*'
'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*'
)
}
Get-ItemProperty $regpath | .{process{if($_.DisplayName -and $_.UninstallString) { $_ } }} | Select DisplayName, Publisher, InstallDate, DisplayVersion, UninstallString |Sort DisplayName
}
$result = Get-InstalledApps | where {$_.DisplayName -like $appToMatch}
If ($result -eq $null) {
(Start-Process -FilePath $msiFile -ArgumentList $msiArgs -Wait -Passthru).ExitCode
}