Yes, John.
You can use your AVG Internet Security - Unlimited on multiple Windows and Android device.
Refer the following article: http://support.avg.com/SupportArticleView?urlname=Download-and-install-AVG-Protection to install AVG Internet Security Unlimited and activate it using the email address registered with AVG.
I have paid subscription on one pc at my house. Can I use the same subscription for another pc, which uses a different email at the same ip address?
Yes, John.
You can use your AVG Internet Security - Unlimited on multiple Windows and Android device.
Refer the following article: http://support.avg.com/SupportArticleView?urlname=Download-and-install-AVG-Protection to install AVG Internet Security Unlimited and activate it using the email address registered with AVG.