I recently bought a new laptop that came with a trial of McAfee, but I already have a subscription for Malwarebytes. I’m thinking about keeping both active to ensure that if one misses a threat, the other will catch it. Is this a good strategy for "maximum security," or will they interfere with each other? I’ve heard rumors that running two real-time scanners can cause system crashes or make the computer incredibly slow. What is the expert recommendation here?
3 answers
Generally, running two real-time antivirus engines is a recipe for disaster. They will compete for access to the same system files, which often leads to "deadlocks," causing your OS to freeze or crash. Furthermore, one antivirus might detect the virus definitions of the other as a threat, leading to a loop of false positives. The standard recommendation is to have one primary real-time scanner (like McAfee or Windows Defender) and use a second tool (like Malwarebytes) strictly for on-demand manual scans to avoid these background conflicts.
If I disable the "Real-Time Protection" on one of them and only use it for weekly manual scans, would that solve the performance issues you mentioned?
No, don't do it. It’s like having two security guards trying to check the same ID at the same time—it just causes a massive bottleneck and confusion.
That’s a perfect analogy, Susan! I tried this once and my boot time went from 20 seconds to 5 minutes. Stick to one active shield and one manual scanner.
Yes, Steven, that is the safest way to do it. By disabling the active "sentinel" mode on the second program, you prevent it from hooking into the system kernel at the same time as the primary one. This gives you the benefit of a second opinion during a manual scan without the risk of your computer turning into a brick due to software incompatibility.