Changing size of display

Hello Jane, 
We're sorry to know that you're facing this problem.
We regret the inconvenience caused.
This is not the expected behaviour of the AVG Driver Updater program, I request you to follow the steps mentioned in the below article and check if it helps.
Troubleshooting issues after running AVG Driver Updater
If the issue persists or need more assistance, please let us know, we will certainly help you with the additional support.
Thank you.

Purchased and installed AVG Driver update overnight.  This morning, the font/text size of everything on desktop display is huge and none of recommended actions to reduce size have worked.  Please advise how to get things back to my original size settings.  Thank you.

Hello Jane, 
We're sorry to know that you're facing this problem.
We regret the inconvenience caused.
This is not the expected behaviour of the AVG Driver Updater program, I request you to follow the steps mentioned in the below article and check if it helps.
Troubleshooting issues after running AVG Driver Updater
If the issue persists or need more assistance, please let us know, we will certainly help you with the additional support.
Thank you.