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Not able to install the ToadForOracle_Freeware_12.8.0.49_x64_En

Not able to install ToadForOracle_Freeware_12.8.0.49_x64_En in windows 8.1 PC,

while installing Windows Installer error prompts,

“This installation package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer package”,

I have tried to change the package properties to compatibility mode, but still prompts the same error

Could some one help me to resolve this issue.

My only suggestion is make sure that you run it as administrator.