I purchased a legitimate copy of Office Professional 2010. Because of a delay in purchasing a new computer, I didn't have an opportunity to install the software immediately. When I did install,  the product key was rejected as "expired" by being past 30 days. No where on the box does it indicate the software must be installed within 30 days. This was very expensive software and I don't know how to get this problem fixed. Help!

Hi cgreen,

I suggest you contact Volume Licensing Service Center.

Find your local Volume Licensing Service Center support contact information below.
https://www.microsoft.com/Licensing/servicecenter/Help/Contact.aspx

Please select your country from the drop-down list and the correct Support Center will be displayed at right. To limit the display of countries in the drop-down list to a specific region, first click directly on the map.

Hope it's helpful.

Regards,

Emi Zhang
TechNet Community Su