Hi CrissyCakes, and welcome to TSF.
If you have a look through this part of the forums you will find that many users have had similar problems. If you hang around here awhile i'm sure someone will give you advice on how to solve the problem.
Or you can take the shortcut like i did, i also thought AVG 7.5 was great....until they decided to upgrade it and i really couldn't be bothered anymore.
Take a look
Here.
I am now using Avira Antivir Personal Edition, its free, easy to download and easy to use, pretty much like AVG used to be. You do get a rather irritating pop-up enticing you to upgrade but you just click ok at the bottom and its gone.
Heres the link if you decide to go with it,
Avira Antivir Personal Edition.
Don't forget that you need to uninstall AVG though, its not good to have 2 AV programs on your system at the same time.
Hope this helps.
Regards, Dave.