When we ask a small business how they’re protected, the most common answer is “we have antivirus.” That’s not wrong. It’s just incomplete, and the gap is where most modern attacks happen.
How traditional antivirus works
Antivirus software compares files on your computer against a large list of known malicious programs and patterns. When it finds a match, it blocks or removes the file. That is still useful. It stops a great deal of common, known malware, and every computer should have a solid baseline.
Where antivirus falls short
Attackers know how antivirus works, so many of them avoid giving it anything to find:
- Stolen passwords. If a criminal logs in with a real employee’s credentials, there is no malicious file at all.
- Legitimate tools used the wrong way. Built-in Windows tools and remote administration software can be used to move around a network. They look normal because they are normal programs.
- Attacks that run in memory. Some never write a file to disk, so there is nothing to scan.
- Brand-new threats. A program written yesterday is not on any list yet.
Antivirus also does little after something gets through. It typically can’t show you what happened, which other computers were touched, or how the attacker got in.
What EDR adds
EDR stands for endpoint detection and response. Instead of only checking files against a list, it watches what programs actually do and records the activity on each device. If a program starts behaving like ransomware, such as rapidly encrypting files or disabling security tools, EDR can recognize the behavior even if it has never seen that exact program before. It can then act:
- Isolate the device from the network so the problem can’t spread
- Stop the malicious process as it runs
- Keep a timeline of what happened, so investigators can see how the attacker got in and what they touched
The missing piece: someone to watch it
EDR produces alerts, and alerts only help if someone reads them and decides what to do. For a business with 10 or 50 computers and no security staff, that is the real gap. This is what the “managed” part means: a team monitors the alerts, investigates the suspicious ones, and responds. Our managed endpoint protection works this way, with automated containment around the clock and analysts investigating during business hours.
Side by side
- Antivirus: blocks known threats. Low cost. Little visibility and limited response. Good baseline, not a complete defense.
- EDR: detects suspicious behavior, can isolate devices, records activity. Needs someone to monitor and interpret it.
- Managed EDR (also called MDR): EDR plus a team that watches, investigates, and responds for you. Best fit for businesses without a security team.
Isn’t the built-in Windows protection enough?
Microsoft’s built-in antivirus is a reasonable baseline, and you should leave it on. What matters is what sits on top of it: behavioral detection, the ability to contain a device quickly, and a person who sees the alert. A baseline with nobody watching leaves the same gap as any other antivirus-only setup.
Why insurers and regulators care
Many cyber insurers now ask specifically about EDR rather than antivirus, and businesses that handle financial or health data face rules that expect active monitoring and incident response. We cover the insurance side in cyber insurance requirements for small businesses.
Questions to ask any provider
- Does the protection watch behavior, or only match known threats?
- Can it isolate an infected device automatically, even at 2 a.m.?
- Who reviews the alerts, and when?
- What do I get to see afterward: reports, device coverage, a timeline of incidents?
- What is included in the monthly price, and what costs extra?
Next step
If you are not sure what protects your computers today, request a free security snapshot and we’ll give you a straight answer. You can also read about how everything fits together in what a managed security provider actually does, or compare plans on our services page.