[5] Until approximately 2016 McAfee suffered from poorer malware detection test results and a larger impact on PC performance.

[10] AV-Comparatives’ Real-World Protection Test measures a product’s ability to combat malware under everyday conditions.

Winners of this test, such as McAfee, provide high levels of protection with minimal false alarms, sparing users the stress and burden of identifying whether something is harmful.

[11] On April 21, 2010, beginning approximately at 2 PM GMT, an erroneous virus definition file update from McAfee affected millions of computers worldwide running Windows XP Service Pack 3.

[12][13] An August 2012 update to McAfee antivirus caused the protection to become turned off and users to lose internet connections.