Avira Free Antivirus is developed by a German multinational and family-owned corporation called Avira Operations GmbH. Avira Free Antivirus is available for Windows and Mac computers as well as Android mobile devices, and Avira has some security related apps for iOS as well.
Avira does have regular pop-ups which remind you to upgrade to the paid version of the antivirus software, and a few years back they actually said they were going to remove these pop-ups, but they have not kept their promise. However, there are a few ways to disable them, one is by using a program called BgPKiller also known as Avira Popup Killer, which you can download from this link.
Another way to do it if you have Windows 7 is to follow these instructions from Wikihow to basically disallow the operating system from running the executable files which actually cause the pop-ups.
Avira Free Antivirus comes with a antivirus scanner that actively defends your computer from viruses, worms, trojans and other types of malware, the antivirus also includes a cloud scanning capability, where unknown files are scanned in real-time in the cloud for more accurate results. Additionally Avira obviously also has a on demand scanner which you can use to scan your entire system, just a quick scan of the important parts or a custom scan where you can define the folders and hard drives that you want to check for viruses or other types of malware.
Avira also has a PUA or potentially unwanted application shield, which protects against adware and spyware contained within legitimate software.
As part of the Avira Browser Safety plug-in, which is also free but optional. The browser extension can help to improve your privacy online by blocking websites and corporations that try to track you with cookies and other methods. The plug-in also has a Safe Browsing feature which blocks harmful websites before they load, and it is available for Chrome, Firefox, Opera and Internet Explorer.
One problem I had with Avira on my desktop with Windows 7, was that it crashed it the middle of a full system scan, which was a bit disappointing, I didn’t even make it to 50%.
AV-Test tried out the full version of Avira, which is actually fairly similar to the free one, except with more features obviously. They gave Avira 5.5 out of 6 points for Protection and Usability, as well as 6 out of 6 points for Performance.
My rating for Avira is 7.5 out of 10 points.
Good antivirus protection
Pop-ups can be disabled
Medium to high usage of computer resources
Some crashing issues
Disabling pop-ups possible but can be difficult