Hello,
With reference to your query, you can use the same license key for both the operating systems on the same machine.
Inorder to activate eScan on both operating systems, insert the license key and activate the same in the first OS , copy and save the 60-character activation code separately.
Boot the machine in the second OS ,open the license information window and add the license key and activation code in it.
You may refer the below link for the activation procedure:-
http://download1.mwti.net/wiki/index.php/Escan/english/productkey
In case you have any more queries, please send us an email to
support@escanav.com for further assistance.