Antivirus Basics · 5 min read
What Is Ransomware Protection?
Ransomware protection is a dedicated layer that watches for the behaviour of encryption attacks rather than for specific malware files.
Published 2026-08-09 · Last updated 2026-08-09
Folder access control
The simplest approach whitelists which applications may write to your document folders. Windows implements this as controlled folder access; Bitdefender, Trend Micro and others have equivalents. An unrecognised process attempting to rewrite hundreds of documents is blocked outright.
Behavioural detection and rollback
Higher-end products watch for rapid sequential file modification, shadow-copy deletion and known encryption routines. When triggered, they terminate the process and — in the better implementations — restore affected files from a temporary cache. Rollback typically covers a limited number of recently modified files, not your whole disk.
Why backups still win
Every protection layer can be bypassed by a sufficiently novel attack. A versioned or disconnected backup cannot. Treat ransomware protection as insurance that reduces the chance of needing your backup, never as a replacement for having one.
Frequently asked questions
- Does Windows have built-in ransomware protection?
- Yes — controlled folder access in Windows Security. It is disabled by default and worth enabling.
- Can ransomware protection recover already-encrypted files?
- Only files the product cached during the attack window. Older encrypted files must come from a backup or a family-specific decryptor.