[Resolved]  Quick Heal — Antivirus not compatible with Windows 7

I have purchased Guardin Antivirus (Product of Quick Heal) for 1 year, when i was using Windows Vista Operating system in my notebook. Just after 3 months i have free upgraded Windows Vista into Windows7 OS. My purchased Guardian Antivirus is not compatible with Windows7. I have requested to customer support of the company. But they told me to purchase it again for windows7 compatible. They don't care my previous subscription purchased by me.