Most likely you downloaded a driver from a non-official website and it's full of malware content.
You can visit the following link in order to obtain an official driver for your product. On the page you will find Lexmark X7350 but it's from the same family as your 7300 version and the drivers work just fine. From the drop-down menu, select the corresponding operating system and version and download everything you need. Save the file to a location of yours and double click it to start the installer. Follow the steps provided by the setup and restart the computer after a successful operation.
