Member Avatar for prlrina

Can Viruses infect the hardware ?if yes then how? and if no then wats yur opinion abt Boot Sector Virus?

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Short answer for : a virus cannot change a device’s physical circuitry, but it can replace or corrupt the software stored on hardware — firmware (BIOS/UEFI, HDD/NIC firmware) — and it can infect disk areas such as the boot sector/MBR. That distinction is important when deciding whether a simple reinstall will fix the problem.

Both and are partly correct. As noted, the boot sector/MBR lives on the disk and overwriting it can make a machine unbootable; restoring the MBR or reinstalling the OS usually removes that class of infection. is right that formatting and reinstalling often solves disk-level infections. What those replies miss is firmware-level malware: historically CIH (Chernobyl) could overwrite BIOS flash and brick systems (CIH (Chernobyl)). More recent research shows persistent implants that modify device firmware () and UEFI rootkits such as LoJax ().

Practical triage (summary):

  • Treat disk/MBR infections and firmware compromise differently. Use a trusted rescue environment to perform offline scans and image disks first.
  • For boot/MBR problems, restore the boot record with vendor tools (Windows RE bootrec or equivalent) or reinstall the bootloader; many boot-sector infections are cleared this way. See reputable AV/response guides on boot-sector threats (Kaspersky boot-sector overview).
  • For suspected firmware compromise, verify firmware signatures/versions from the hardware vendor and reflash only with official signed images; if reflashing fails or vendor guidance is absent, hardware replacement may be necessary.
  • Preserve forensic evidence before changes and keep firmware and Secure Boot updated to reduce risk.

Bottom line: most “viruses” live in software and are fixed by cleaning or reinstalling; a smaller but real class can live in firmware and requires vendor tools or replacement.

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Member Avatar for John A

Can Viruses infect the hardware ?if yes then how? and if no then wats yur opinion abt Boot Sector Virus?

Yes, some viruses can affect the hardware. One even killed your BIOS, rendering your computer unbootable. Boot Sector Virus? Wipe your Master Boot Record, and the damage is gone. The Boot Sector (or MBR for that matter) are not hardware. They're a section of the hard drive.
http://en.wikipedia.org/wiki/Boot_sector
http://en.wikipedia.org/wiki/Master_boot_record

That's what I like about Macs. :cheesy:

Member Avatar for DanielSmith

although it made your computer unbootable , it can't infect your hardware. All you need to do is re-installing you OS and fomating your hardware and then everthing is ok. so did the MBR Virus.

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