ive been suing mcafee av for three years and over every full scan the number of boot records has only ever been two... however over the past week it has been showing three boot records..
I searched the forum the first time and people said it may sometimes count one twice, and if it happens three times then it is deffinatly something to worry about....Well ive scanned my computer eight times over the week to see if it still says three, and on every occasion it has.....
im using a samsung laptop with windows vista, that boots from within the laptop, with a c and d drive and that is all. theres nothing else connected to my laptop at all..... ive done full searches with mcafee and malwarebytes but both are coming back clean...
Every partition has its own (hidden) boot record which would explain 2 (C:, and D, but that total would also include any Virtual Machine which could explain #3. Do you have one installed? Or, if this is an OEM system, there may be a hidden recovery partition and perhaps a McAfee software update has made it detect boot records in a slightly different manner, but that's just a guess.
I did find a McAfee user posting a similar query, but with Windows 7, here: http://www.sevenforums.com/general-discussion/267524-3-boot-records-detected-ok.html
I don't think it's anything to worry about, but a Vista forum might be of more help, ther's a good one here: http://www.vistax64.com/ or Technical Support might be able to explain it if you are really deperate to go through that experience ;-)