Murray, Try this…
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.
AVG Guru
Murray, Try this…
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.
AVG Guru