My AVG driver update apparently is not compatable with Vista

When activating program after obtaining license number it will not scan. Scan stops just at windows. I want a credit for the 33.99.  Seems this happened to me last year also.  Order # 701-5509518. who do I contact.??

Hello Juanita,
We regret for the inconvenience. Please be informed that this issue occurs if there are any issues with the updates on your Window's. We kindly request you to update your Windows manually from the control panel and if there are any error message we kindly request you to contact Microsoft support so that they could analyze the issue for you.
If you could complete the Windows update please restart your PC and try to scan for the updates using the driver updater program and check whether it resolves the issue.
Thank you.