If you run a setup file to install a program on your Windows 11 or Windows 10 computer and you receive a message – This installation package could not be opened, Contact the application vendor to verify that this is a valid Windows Installer package, then this post may be able to help you.
This installation package could not be opened
If you receive a “This installation package could not be opened” message, here are a few things you could do:
- Check the setup file
- Re-download the setup file
- Unblock the file
- Temporarily disable security software
- Change download location
- Use an Admin account
- Run Windows Update
- Re-register Windows Installer engine
- Check the status of the Windows Installer Service.
Let us take a look at these suggestions.
1] Check the setup file
Check if the setup file is meant for your version of Windows – 32-Bit or 64-Bit
2] Re-download the setup file
Maybe the download was interrupted or got corrupted. Clear your browser cache and re-download the setup and see it it works.
3] Unblock the file
Right-click on the .exe file, select Properties and then click on the Unblock button – if the file has been blocked, to unlock the file.
4] Temporarily disable security software
Disable your security software temporarily and see if that helps. But remember that your computer will be unprotected, and if the setup contains any malware, your computer will be vulnerable. So do this only if you totally trust the downloaded package.
5] Change download location
If you saved the setup file on a Network, you may get to see this message. Save it to your local computer and run and see if it works.
6] Use an Admin account
Maybe Administrator rights are required. So then either log in to an Administrator account or create a new Administrator account, log into the Administrator account and then run the Installer package.
7] Run Windows Update
Run Windows Update to make sure that you are running the latest version of Windows Installer. Or then, maybe your Windows Installer file has been corrupted. Run System File Checker and reboot once the scan is completed. If you need to, you can download the latest version of Windows Installer here from Microsoft.
8] Re-register Windows Installer engine
You may also want to consider re-registering the Windows Installer engine. To do so, open Command Prompt, type the following and hit Enter:
Now to register it again, type the following and hit Enter.
9] Check the status of the Windows Installer Service
Run services.msc to open the Services Manager and check the status of the Windows Installer Service or msiexec.exe process. Its Startup style should be set to Manual, by default.
Windows Installer Service Adds, modifies, and removes applications provided as a Windows Installer (*.msi, *.msp) package. If this service is disabled, any services that explicitly depend on it will fail to start.
Double click on Windows Installer to open its Properties box and then click on the Start button to start the service. Click on the Start button Now run the setup and see if that helps.
See this post if Windows Installer Service can not be accessed and this one if you receive Windows might be installed in an unsupported directory message.
- There is a problem with this Windows Installer package
- Please wait until the current program is finished uninstalling or being changed
- Another installation is already in progress.
Let us know if anything worked for you or if you have other suggestions.