i have home and student 2010 and i have just got a new laptop as 2 of my computers died. it wont let me insall this office as its already on the old computers that are in the bin. when i tried to activate it i got the message that i already have it on my limit of computers. what can i do

Hi,

As far as I know,for software marked Home and Student edition, you may install one copy of the software on up to three licensed devices in your household for use by people for whom that is their primary residence. The software may not be used for commercial, nonprofit, or revenue-generating activities.

More reference: https://products.office.com/en-us/microsoft-software-license-terms-for-microsoft-office-2010?legRedir=true&CorrelationId=4b754aa3-9b3d-45f0-a465-2d0de58b8397

This alert message pop-up when the activation servers will see the 4th computer. We should uninstall from the computer that is being replaced. 

Then, we also can activate Office 2010 by phone:

https://support.office.com/en-ca/article/Activate-Office-2010-1fe7340c-50e2-458f-8677-f57f5a140f46

Regards,

George Zhao
TechNet Community Support