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<blockquote data-quote="HarborFront" data-source="post: 1014076" data-attributes="member: 55987">Look. If scanning catches a virus it&#039;ll show up otherwise there&#039;s nothing for the AV to show.Definition of a boot sector virusA boot sector is a reserved section of a disk that contains the code and data needed to start the operating system (OS) of a computer. A boot sector virus is a type of malware that infects a system’s boot partition or the Master Boot Record (MBR) of a hard disk. During startup and before security software can be executed, the virus executes malicious code. Once a computer is infected, a boot sector virus will try to infect every disk that is accessed on the infected system.If the virus is encrypted then the virus cannot perform its malicious actions without itself decrypt first. That is to say, the virus is useless if it stays in its encrypted state. AV software like Avast can detect during boot time when the encrypted boot sector virus decrypts itself to cause malicious actions. If malware prevents Avast Antivirus from running in normal mode, you can schedule Boot-Time Scan to run in Safe Mode.Read here[URL unfurl=&quot;true&quot;]https://support.avast.com/en-us/article/Antivirus-Boot-time-Scan#pc[/URL]EDIT - I see you already posted at the Malware Removal Section</blockquote>

[QUOTE="HarborFront, post: 1014076, member: 55987"] Look. If scanning catches a virus it'll show up otherwise there's nothing for the AV to show. Definition of a boot sector virus A boot sector is a reserved section of a disk that contains the code and data needed to start the operating system (OS) of a computer. A boot sector virus is a type of malware that infects a system’s boot partition or the Master Boot Record (MBR) of a hard disk. During startup and before security software can be executed, the virus executes malicious code. Once a computer is infected, a boot sector virus will try to infect every disk that is accessed on the infected system. If the virus is encrypted then the virus cannot perform its malicious actions without itself decrypt first. That is to say, the virus is useless if it stays in its encrypted state. AV software like Avast can detect during boot time when the encrypted boot sector virus decrypts itself to cause malicious actions. If malware prevents Avast Antivirus from running in normal mode, you can schedule Boot-Time Scan to run in Safe Mode. Read here [URL unfurl="true"]https://support.avast.com/en-us/article/Antivirus-Boot-time-Scan#pc[/URL] EDIT - I see you already posted at the Malware Removal Section [/QUOTE]

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