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<blockquote data-quote="Victor M" data-source="post: 1076748" data-attributes="member: 96560">It resides on the boot sectors of the disk. It is aside from the partition table where you define various partitions that you label C, D etc.An AV that boots from another media like CD, DVD, USB stick will work, since it doesn&#039;t boot from that boot sector on the HDD. And any hacker tool that resides in the boot sector will not activate and defend itself. But this CD has to be prepared from a known clean machine.I had a machine which was from 2008 or there abouts. And for those old machines hackers can actually infect the BIOS. (days before UEFI came about) There is slack space in the BIOS to allow for newer larger versions., and it must have resided there. Those infections have god mode access that controls the entire machine. This was rumored to be due to leaked malware research by NSA, and it affects old BIOSs. I had horrible memories of that episode; I lost the battle. So if you are still keeping pcs from that era, get rid of them. People recommend bare bones Linux versions for them or download old versions of Windows to make them useful again, avoid the risk. Once an attacker knows about the age of the machine and attacks, there is no possible remediation.</blockquote>

[QUOTE="Victor M, post: 1076748, member: 96560"] It resides on the boot sectors of the disk. It is aside from the partition table where you define various partitions that you label C, D etc. An AV that boots from another media like CD, DVD, USB stick will work, since it doesn't boot from that boot sector on the HDD. And any hacker tool that resides in the boot sector will not activate and defend itself. But this CD has to be prepared from a known clean machine. I had a machine which was from 2008 or there abouts. And for those old machines hackers can actually infect the BIOS. (days before UEFI came about) There is slack space in the BIOS to allow for newer larger versions., and it must have resided there. Those infections have god mode access that controls the entire machine. This was rumored to be due to leaked malware research by NSA, and it affects old BIOSs. I had horrible memories of that episode; I lost the battle. So if you are still keeping pcs from that era, get rid of them. People recommend bare bones Linux versions for them or download old versions of Windows to make them useful again, avoid the risk. Once an attacker knows about the age of the machine and attacks, there is no possible remediation. [/QUOTE]

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