I'm trying to detect .net extended via registry uninstall GUID {8E34682C-8118-31F1-BC4C-98CD9675E1C2}. Once detected, I would like dotNetFx40_Full_x86_x64.exe not to install but if not detected, I would like dotNetFx40_Full_x86_x64.exe to be installed and followed by the BrainStorm application installation. See script below. It is currently set to continueonerror but it always install .net even if it is detected. Thanks for all of your help.
#*===============================================
#* PRE-INSTALLATION
If ($deploymentType -ne "uninstall") { $installPhase = "Pre-Installation"
#*===============================================
# Show Welcome Message, close applications if required, allow up to 3 deferrals
Show-InstallationWelcome -CloseApps "iexplore,excel,groove,onenote,infopath,onenote,outlook,mspub,powerpnt,winword,winproj,visio" -AllowDefer -DeferTimes 3
# Show Progress Message (with the default message)
# Scans for .NET Extended Installation
Get-RegistryKey "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{8E34682C-8118-31F1-BC4C-98CD9675E1C2}" -ContinueOnError
# Show Installation in Progress
Show-InstallationProgress "BrainStorm 3.02 Installation in Progress..." -WindowLocation "BottomRight" -TopMost $false
# Remove any previous versions of BrainStorm
Remove-MSIApplications "BrainStorm"
#*===============================================
#* INSTALLATION
$installPhase = "Installation"
#*===============================================
# Install the base EXE
Execute-Process -FilePath "dotNetFx40_Full_x86_x64.exe" -Arguments "/q /norestart"
# Install the base MSI and apply a transform
Execute-MSI -Action Install -Path "BrainStormQuickHelpX86.msi" -Transform "Brainstorm_Training_3.0.mst" -Parameters "DESKTOPICON=0 LOGINMETHOD=SSO COMPANYNAME=test.com /QN"
