A computer on a corporate network has a malware infection. Which of the following would be the BEST method for returning the computer to service?

Question

Options

• AScanning the system with a Linux live disc, flashing the BIOS, and then returning the computer to
• BFlashing the BIOS, reformatting the drive, and then reinstalling the OS
• CDegaussing the hard drive, flashing the BIOS, and then reinstalling the OS
• DReinstalling the OS, flashing the BIOS, and then scanning with on-premises antivirus

• A
  3% (1)
• B
  81% (25)
• C
  6% (2)
• D
  10% (3)

Explanation

The best practice for remediating a malware-infected corporate machine is to flash the BIOS, reformat the drive, and reinstall the OS (B). Flashing the BIOS removes any firmware-level (rootkit) malware. Reformatting the drive completely wipes the OS and all malware. Reinstalling the OS gives a clean, trusted state. Option A skips formatting first. Option C (degaussing) destroys magnetic media, making the drive unusable for reinstallation. Option D is backwards - scanning after reinstalling is insufficient because malware may persist through an in-place reinstall without wiping first.

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