Your Security. Our Mission.
Find and remove malware. Simply.
LC9 Defence scans your Windows PC for viruses, trojans, spyware and ransomware, tells you what it found in plain English, and locks threats away safely. LC9 Free costs nothing and works offline.
For Windows 11 and Windows 10. No payment card for LC9 Free.
How LC9 Defence protects your computer
Layered checks that run on your PC. Your files are never uploaded anywhere.
Known threats
Every file is checked against signed malware definitions stored on your PC: exact fingerprints and byte patterns of known malware.
Warning signs
LC9 looks inside programs and scripts without running them: hidden code, code injection, password theft, backup deletion, disguised file names.
Fewer false alarms
Signed software from trusted publishers isn't flagged on suspicion alone, and suspicious files are never removed without you choosing to.
Safe quarantine
Threats are encrypted and locked away so they can't run. Nothing is deleted for good unless you say so.
Free and Premium
LC9 Free
£0
Real malware scanning and removal, with no time limit and no catch.
- Quick, Full, folder, file and USB scans
- Known-threat and suspicious-file detection
- Quarantine, restore and removal
- Works offline
- Signed definition updates
LC9 Premium
Coming soon£9.99 / month
or £99.99 a year (save £19.89). Everything in Free, plus protection that works all the time, on up to 3 PCs.
- Real-time protection
- Ransomware Shield
- Web protection
- Scheduled scans and automatic updates
Premium isn't on sale yet. We'll only sell it once every feature above is finished and tested.
About PremiumUp and running in minutes
- 1
Download
Get LC9 Free from the download page. No account and no payment card needed.
- 2
Install
Run LC9DefenceSetup.exe. It installs for your Windows user, without needing administrator rights.
- 3
Scan
Click SCAN NOW. A Quick Scan checks the places malware most often hides in a few minutes.
- 4
Remove
Anything found is explained in plain English. Quarantine it with one click, or restore it if you know it's safe.
No scare tactics. No false promises.
No antivirus catches every threat, and we won't pretend ours does. LC9 Defence tells you what it found and why, never removes your files without asking, and only advertises features that are actually built.
See exactly what LC9 does today →