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If you’ve bought a new laptop or desktop recently, chances are it came with McAfee already installed. It’s one of those “just leave it there” bits of software many businesses never question.

But here’s the honest truth - we often see McAfee causing more frustration than reassurance, especially for small UK businesses trying to keep things running smoothly. So, is it actually doing its job… or quietly slowing everything down?

Let’s break it down in plain English.

Let’s be honest - most business owners don’t actively choose McAfee. It’s typically:

• Pre-installed on new machines
• Included as a trial (often 30–90 days)
• Renewed automatically without much thought

On paper, that sounds convenient. No setup, no decisions, job done.

But in reality, we regularly come across issues like:

• Sluggish PCs (especially on startup)
• Pop-ups prompting upgrades or renewals
• Background scans affecting performance
• Staff complaining that “the computer is just slow today”

And more often than not, McAfee is part of the picture.

To give credit where it’s due, McAfee isn’t useless. It does offer:

• Real-time virus protection – Helps block known threats
• Web protection tools – Warns about unsafe websites
• Firewall features – Adds an extra layer of security
• All-in-one packages – Covers multiple devices in one licence

For home users or very light business use, it can be “good enough.”

But for businesses that rely on speed and consistency? That’s where things start to wobble.

Across many of the systems we manage, McAfee tends to have a noticeably higher overhead than other antivirus solutions.

In plain terms, that means:

• It uses more system resources (CPU and memory)
• It runs frequent background processes
• It can slow down boot times and general responsiveness

This is especially noticeable on:

• Older PCs
• Entry-level laptops
• Machines running multiple business apps (e.g. accounting software, browsers with lots of tabs)

Independent antivirus testing organisations (like AV-Test and AV-Comparatives) regularly measure performance impact - how much security software slows a system down.

While McAfee often scores well for protection, results over the years have shown:

• Moderate to high system load during scans
• Slower file copying and application launching compared to lighter alternatives
• Background activity affecting performance even when idle

(These findings vary by version and test cycle, but the trend is consistent enough to be worth noting.)

A slight slowdown might not sound like a big deal- but across a team, it adds up:

• 10–15 seconds extra boot time × multiple staff = lost time daily
• Slower apps = frustration and reduced productivity
• “Freezing” during scans = disruption mid-task

Over weeks and months, that’s a real cost.

McAfee tends to run a lot behind the scenes:

• Continuous real-time scanning
• Scheduled full system scans
• Browser monitoring tools
• Update services and background checks

Think of it like having a security guard checking every single person multiple times before letting them into the building. Safe? Yes. Efficient? Not always.

Other modern solutions aim to be smarter—checking only what’s necessary, when it’s necessary.

If you’re unsure whether it’s affecting your systems, look out for:

• PCs taking ages to start up
• Fans running loudly even with light usage
• Delays opening files or applications
• Performance dips at the same time each day (often scheduled scans)
• Staff regularly restarting machines to “speed things up”

We see these patterns regularly - and removing or replacing McAfee often leads to an immediate improvement.

Without pushing any one vendor, there are lighter, business-friendly options available that tend to offer:

• Lower system impact
• Quieter operation (fewer pop-ups)
• Central management for multiple devices
• Better performance on older hardware

Even built-in tools like Microsoft Defender (included with Windows) have improved massively and are now a solid baseline for many small businesses.

The key is choosing something right-sized for your setup—not just sticking with what came in the box.

Switching or reviewing your current setup can bring some quick wins:

• Faster PCs – noticeable improvement straight away
• Happier staff – fewer complaints about slow machines
• Better value – avoid paying for something that isn’t ideal
• Stronger security posture – when properly configured

It’s one of those small changes that can make a big day-to-day difference.

• Go to your installed programs
• Look for McAfee subscriptions or trials
• Check expiry dates—you might be paying without realising

• Open Task Manager (Ctrl + Shift + Esc)
• Look for high CPU or memory usage linked to McAfee processes

• Check how long your PC takes to boot
• Compare before and after disabling startup items (carefully)

• This can actually slow things down further and cause conflicts

• A quick IT health check can confirm whether McAfee is helping or hindering

McAfee isn’t “bad”—but for many small businesses, it’s simply not the best fit. The biggest issue we see is its high system overhead, which can quietly drag down performance over time.

If your team is dealing with slow machines, it’s absolutely worth reviewing what’s running in the background—especially if it came pre-installed.

Got a question? Get in touch and we’ll get you sorted.
We’ll take a look at your setup and recommend something that keeps you protected without slowing everything down.