Jessamyn, Please try following these steps:
Open AVG.
In the top menu click Options, and then click Advanced Settings.
In the left part of the Advanced Settings window double-click Update to show further options.
Click Manage, and then click Delete temporary update files.
Tip: If double-clicking Update does not show the Manage option, click the [+] icon next to Update.
Restart your computer.
Open AVG again, and then click Update now to make sure your AVG is up to date.
Jessamyn, Please try following these steps:
Open AVG.
In the top menu click Options, and then click Advanced Settings.
In the left part of the Advanced Settings window double-click Update to show further options.
Click Manage, and then click Delete temporary update files.
Tip: If double-clicking Update does not show the Manage option, click the [+] icon next to Update.
Restart your computer.
Open AVG again, and then click Update now to make sure your AVG is up to date.