"GenB" is short for "generic boot sector infector" and "GenP" for "generic partition sector infector". There are no such viruses at all. These are simply a "shorthand" that McAfee SCAN uses to tell you that it is sure there is something suspicious in your diskette's boot sector (GenB) or your hard disk's MBR (GenP) but it doesn't know precisely what.
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More scanning & removal options
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.
F-Secure anti-virus products detect the viruses known to McAfee as "GenB" or "GenP" by their CARO names.
The last time we looked, SCAN detected the following viruses as "GenB" or "GenP": Abs-3, AntiCMOS, B2, Boot-Y, BootEXE, Crazy_Eddie, Den_Zuko, Digress, Eko_Terror, Exe_Bug, Flip, Frankenstein, Gena, Hex, Ibex, JKTK, Joshi, KeyDrop, Malaga, MPHTI, MZ_Boot, Peanut, Pilgrim, Pretty, Revolution, Rm, SBP, Sciagura, Screaming_Fist, Silly, Smile, Stakkabo, Strange, Tequila, Tiso, Tony_Boot, Verify, VVM.B, X-Boot and Yeah.