To make sure that you are logged into Windows 7 as a user with administrative rights:
- On the taskbar, click Start -> Control Panel.
- Open User Accounts.
- Click Manage another account.
All user accounts will be listed on the page. Each account has a status (Administrator, Standard user, etc.). Before installing or reinstalling AVG, make sure that you are logged into Windows under an account with Administrator status.
If you are not sure which account you are currently logged into, please open the main User Accounts page. The current user is displayed in the right part of the page.
Source : Official AVGsa Website
Editor by : BEST Antivirus KBS Team