Did you try..
Right-clicking on the toolbar and unchecking the "AVG Security Toolbar" option on the list? (See #1695 of their FAQ. "What is the AVG Security Toolbar and how can I disable it?")
According to another FAQ (#1257) with the same title, it states in a Note: .. "When you just disable the AVG Security Toolbar it will be automatically enabled again in one week by default. If you want to disable it permanently please right-click the AVG Security Toolbar and select the Options from context menu. Click the Advanced Options tab and untick the Re-display the AVG Security Toolbar when hidden (weekly) option. Save the change by pressing the OK button'
I don't use AVG as my A/V, so I wouldn't know if the information (directly above) still applies. It looks as though, FAQ #1257 was replaced by FAQ #1695. (Both FAQ's have the same title, and include much of the same information, with the exception of the added "Note")
Best of luck..
I have the AVG 8.5 Free on my computer. I do not have any problems with AVG 8.5 Free. Whenever I turn on my computer a screen comes up stating "The AVG Security Toolbar was hidden within your browser so we restored it. OK?". I deliberately took this off my Internet Explorer toolbar because it took up space on my screen. I don't want this screen to come up. This screen is a nuisance. How do I stop this screen from showing up? Thank you. user470