Installing Painter essential 6 an error occurred. (Previously, there had never been a problem) Any guru can help solve my problem? Please

This is the message that appears when installing the program.

"The setup encountered problem while trying to configure your software. Could not access file: .......................setup.msi .This action is only valid for products that are currently installed. Would you like to continue?"  

When I press continue Installing the program still has the same problem. Before this, not any problems. I purchased the program correctly from the company's website.