Why antivirus falls short
Antivirus was built for a time when malware arrived as a file that could be fingerprinted. Modern attacks rarely work that way. Attackers sign in with stolen passwords, use legitimate admin tools already on the computer, or change their code for each victim. There is no signature to match until after someone else has been hit.
Ransomware is the costly example: by the time a signature exists, the files are already encrypted.
What EDR does differently
EDR records what happens on each computer and looks for behavior that signals an attack, such as a program suddenly encrypting hundreds of files or a user account trying to dump passwords. When it sees that, it stops the process, cuts the computer off from the network, and keeps a timeline so you know what was touched.
Why monitoring matters as much as the software
An alert at 2am does nothing if nobody reads it until Monday. EDR is most effective when someone is watching it around the clock and can act straight away. That is why our managed IT plans pair EDR with 24/7 monitoring rather than installing it and walking away.
The other controls that matter
EDR is one layer. The controls that stop most real-world attacks work together:
- Multi-factor authentication on email and every remote login.
- Regular patching of Windows, macOS and applications.
- Immutable backups that ransomware can’t delete.
- A business firewall in front of the network.