Sorry for the delayed response
Please open security center on the first computer , then click on Subscription (top right corner)
You can find the registered email address from here .
if you haven’t installed McAfee on the On your second laptop , please login here : http://us.mcafee.com/root/login.asp
Enter the credentials and redownload the software
If you don’t know the password – please use the forgot password option from there .