F-Prot False Positive & Blacklist Removal

By DrGlenn — USA-based WordPress security specialist· 290+ cleanups across 34 countries· Updated June 22, 2026

Is a F-Prot detection a real problem?

F-Prot is a retired / discontinued engine. FRISK Software was bought by Commtouch/Cyren in 2012; F-PROT reached end-of-life (no more signature updates) on July 31, 2021, and Cyren itself liquidated in 2023. Not a live scanning engine. If you are seeing a F-Prot detection — almost always on an old VirusTotal report — it is very likely a stale, cached result from an engine that is no longer maintained, not proof your site is infected today.

What to do about it

Re-scan with my free Is My Site Hacked? checker and on VirusTotal.
Check whether any currently-maintained engines (Google Safe Browsing, Microsoft, Bitdefender, Norton, etc.) also flag you. If only retired engines like F-Prot show a hit, it is effectively a false positive you can disregard.
If a live engine flags you too, your site likely has a real infection — get it cleaned and the detections clear.

Need a real cleanup or a delisting handled?

I am a USA-based WordPress security specialist. If your site is genuinely flagged by current engines, I remove the infection completely, submit the delistings on your behalf, and harden the site so it stays clean — one accountable person, not an overseas queue.

Get my site cleaned · See how it works · read my client reviews.

Frequently asked questions

Is a F-Prot detection dangerous? On its own, rarely — because F-Prot is no longer maintained, its verdicts are old. What matters is whether any current engine also flags you. Re-scan to be sure.

How do I remove a F-Prot detection? There is no active submission channel for a retired engine. Confirm your site is clean, ignore the stale flag, and if live engines also detect you, get a full cleanup.

More removal guides: Yandex Safe Browsing, Avast, Cyren (now Varist) · all vendor guides · full report-link directory.