During installation of software that uses Windows Installer (MSI) technology, a message "This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package." usually indicates an incomplete or corrupt installation file.

If the software was downloaded, it should be re-downloaded. The best method to verify that the downloaded file is complete, is to check its digital signature.

Adblockers and low-quality antivirus programs are a main cause of blocked and damaged downloads. If the issue persists after a re-download, consider disabling any antimalware tools other than the most reputable ones (e.g. Windows Defender, Kaspersky, etc.)

Related Links

• Digital Signatures in Windows Executable Files
• Windows Installer Logging
• Troubleshooting Installation Errors
• Support for Online Sales and Related Downloads
• Safer Windows