Avira Premium is security software for your PC. After downloading it from the company site - to get the latest version - you can scan all files for viruses or malware. Download the setup file to your PC and save it. Sometimes the umbrella icon of Avira does not open completely because the MailGuard module is disabled.
To fix it, open Avira with the umbrella icon on the taskbar and select start. As the dialog box opens select the online protection section, where your options are WebGuard and MailGuard. If MailGuard looks disabled, select it to view the help option. Go to the control panel and modify required settings for AntiVir MailGuard, and then restart your PC.