28. 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?
Answer: B
Reformatting the drive and reinstalling the OS is the best method for returning the computer to service.
By reformatting the drive and reinstalling the operating system, all traces of malware are effectively removed, ensuring the computer is clean and secure for use in the corporate network.
A) Scanning the system with a Linux live disc, flashing the BIOS, and then returning the computer to service
This option is not ideal because while scanning with a Linux live disc may identify some malware, it does not guarantee complete removal. Additionally, flashing the BIOS is unnecessary for most malware infections and does not address any existing issues on the hard drive itself.
B) Flashing the BIOS, reformatting the drive, and then reinstalling the OS
This option is the best approach. Reformatting the drive ensures all malware is removed, and reinstalling the OS provides a clean, fresh environment for the computer to operate securely. Flashing the BIOS can be a precautionary step but is not essential for addressing typical malware infections.
C) Degaussing the hard drive, flashing the BIOS, and then reinstalling the OS
Degaussing the hard drive is an extreme measure that renders the drive unusable and is unnecessary for most malware situations. Flashing the BIOS does not directly address the malware issue, and thus this option is not practical for returning the computer to service effectively.
D) Reinstalling the OS, flashing the BIOS, and then scanning with on-premises antivirus
While reinstalling the OS is a good step, flashing the BIOS adds unnecessary complexity and may not resolve the underlying malware issue. Scanning afterward with antivirus may be useful but is redundant since the OS reinstallation should have already cleared the malware.
Conclusion
Option B stands out as the most effective method for returning the computer to service after a malware infection. It directly addresses the need to remove all malware by reformatting the hard drive and reinstalling the OS, ensuring a clean start. Other options either introduce unnecessary steps or fail to adequately address the core issue of malware removal.