In my original post I made an error regarding activating the AVG context menu when I said use Numpad 8 when I should have put Numpad 9 to simulate a right click. Apologies, corrected instructions follow:
2Press enter on the Notifications chevron button.
3 Use arrow keys to scroll the overflow notifications list until you locate the AVG anti-virus button.
4 Press NVDA+numpad 8 to move mouse focus to the AVG button
5 Press Numpad 9 to activate the AVG context menu (Note: i can’t get the Applications key to invoke the AVG context menu, hence the 2 step process)
6. ‘Temporarily disable AVG protection’ appears in the Context menu list.
When you activate the disable option, a dialog appears with various warnings about removeing protection and instructions about re-enabling it. You can also set a timer to automatically re-enable protection after a certain time has elapsed.