• You receive the notification that your installation package file is "not recognized as valid installation package"

If you are installing ESET Smart Security or ESET NOD32 Antivirus and receive the following error message, “This installation package is not supported by this processor type - contact the vendor”, you may be attempting to install the 64-bit version of the software on a 32-bit operating system. To resolve this issue, follow the step-by-step instructions in the following Knowledgebase article:

• Determine whether you have a 32-bit or 64-bit operating system