There is no virus known by this name to F-Secure anti-virus products. However, this 'virus' is sometimes reported, because some versions of McAfee Scan install a special MBR code while disinfecting boot viruses. This MBR will always display text "Loading Bootstrap..." during boot-up.
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.