Stiftung Warentest checks antivirus programs: Good protection is also available free of charge. Good protection can also be found in paid versions of antivirus software.
Only one tested program was given a grade of “Very Good” by the consumer magazine. The best free option was Bitdefender Antivirus Free for Windows, although significant flaws in the privacy policy were also found. Three Kaspersky products were removed from the test due to security concerns. The reason for this is a warning from the Federal Office for Information Security (BSI)