What you are experiencing is most likely due to a recent Windows Update on your system. It is normal that AVG shows that files, the Master Boot Record, or Boot record have changed. These are done doing normal maintenance, when you or Windows updates files or have had to correct errors on the drive. The only time that you should worry is if they also show as infected.

To get AVG to quit showing them as changed, open the AVG Test Center, click the F3 key on your keyboard and tell it to accept the changes. If it still shows something as changed after this... delete the file named AVG7QT.DAT in C: and AVG will rebuild it the next time it is run.

To help prevent this message, you can use the CleanUp! from our Free Utilities page. You can add the file (AVG7QT.DAT) to the Options section to remove it each time that you run the CleanUp! utility. To do this open CleanUp! and click on the "Options..." button. From the Options window, click on the "Custom Files" tab and click the "Add" button to add "C:\AVG7QT.DAT" to the list. Once this is done, run CleanUp! to clean your system of temporary and other unnecessary files. The next time AVG runs a scan, the AVG7QT.DAT will be recreated.