When trying to INSTALL the Eset ESS-5 program I got the strong recommendation to uninstall an F-Secure anti-virus before continue with the Eset.

The procedure given by Eset to uninstall F-Secure anti-virus was not solution at all because in my CONTROL Panel > Add or remove programs there's no F-Secure.

I used F-Secure Blacklight months ago, but even though I understand that this self-executable program leaves nothing in the PC, I still suspect that what Eset finds is some Blacklight leftover.

According to F-Secure home page:

«BlackLight is not installed in the normal sense. It is a simple executable FILE that is downloaded into your computer and it can be run by double-clicking on the file. There are no items in the "start"-menu or keys in the registry. "Uninstallation" of BlackLight simply means deleting the file. Location of the file is dependant on how you downloaded the file and which browser you used. If you downloaded the file with IE and chose "run", blbeta.exe is USUALLY stored in "C:\DOCUMENTS and Settings\<username>\Local Settings\Temporary Internet Files».

but it has been impossible for me to find any blbeta in my PC.

Does anybody know how to find that "thing" that Eset detects?
You can try running the F-Secure removal tool.

F-Secure products - F-Secure Uninstallation toolThanks, but I already said that F-Secure uninstallation tools procedure is looking for F-Secure in Control Panel > Add or remove programs, and I have no F-Secure there.