[Johnny19]

XP Home, Dell. Firefox in Sandboxie. Pop up of blank window with AVG Icon, title "Web Browser". Task Manager says avgtray.exe.

[Cookiegal]

I've removed the screenshot and edited the text as we don't allow profanity, even if it's an acronym. This is a family oriented site.

I assume you just upgraded AVG to version 9? Because I'm seeing a lot of people having the same problem and it seems that uninstalling and reinstalling may fix it.

I would do a full uninstall via the Control Panel first and then run the AVG removal tool to be sure all remnants are gone, then reboot the machine before reinstalling again.

Here's a link to the removal tool:

http://www.avg.com/us-en/download-tools

Let us know how that goes.