PandaLabs says that the fake warning is distributed via email and users are forwarding it or publishing it on Facebook walls, so further spreading the virus hoax.

The text of the fake warning reads as:

ALERT >>>>> Has your facebook been running slow lately? Go to `Settings' and select `application settings,' change the dropdown box to `added to profile'. If you see one in there called `Sun named app' delete it Its an internal spybot. Pass it on. about a minute ago. i checked and it was on mine.

The IT security firm says there is no associated link, but if users search the web for more information, they will encounter numerous malicious websites designed to download fake antiviruses.

The fake antivirus – which PandaLabs calls rogueware – in this case is `cold LivePcCare.'

PandaLabs is advising Facebook users not to contribute to the propagation of this fake virus warning, and, as always, to ensure their computers have the latest protection technologies.

"PandaLabs also urges users to run frequent on-demand scans of their computers."