There are several different messages that indicate you may have an invalid key which may be displayed. The product you ordered has a single academic license which means it can only be installed once on a single machine.

See the information below for products ordered from specific publishers.

Microsoft Products (Mail Orders)

You will receive the “invalid” error message if:

• You have a trial version of the software already installed. You must uninstall the trial version first and then install the new software.
• You have already installed it and are trying to install the software again on another machine. If you need to re-install, call the Microsoft Customer Care center at 1-800-936-5700

Ensure that you have the following information available before contacting Microsoft:

• Your name
• Your institution name
• Microsoft product name - Purchased under the Student Select agreement.
• Serial key number
• Agreement number – Located in the Your Account section under the software history page for this product
• Enrollment Number – Located in the Your Account section under the software history page for this product
• Reason for your request

If you still require help, contact support by clicking the Contact Us link at the bottom of the Help page.