Re-activation issue after computer wipe

Deborah, You shouldn't have both anti virus and internet security packages installed on the same system. AVG IS includes AVG AV. Have a look @ this webpage (http://www.avg.com/ww-en/buy-antivirus) [Scroll Down].
AVG Guru

Hi
I have the anti virus and internet security packages.  However, my computer got hacked recently and I needed to get everything wiped and re-installed. 
The shop who did this installed the pro internet security package which will expire in 29 days and I don't know how to re-activate it with my paid for subscription.  I have the codes for both AV and IS but can't work our what to do next.
Thanks

Hello Deborah,
Please be informed that AVG internet security is a more advanced version of the AVG Antivirus program. Please enter renewal and upgraded license number in the AVG Antivirus activation tab to activate AVG Internet security.

Have a look at this articlehttp://support.avg.com/SupportArticleView?urlname=Activate-AVG-AntiVirus-or-Internet-Security-with-a-new-license-number to activate the AVG Internet security.
Please feel free to get back to us for any issues with AVG.
Thank you.