CompTIA Security+ Question I-92

A Windows-based computer is infected with malware and is running too slowly to boot and run a malware scanner. Which of the following is the BEST way to run the malware scanner?

A. Kill all system processes
B. Enable the firewall
C. Boot from CD/USB
D. Disable the network connection

Answer: C

Explanation:
Antivirus companies frequently create boot discs you can use to scan and repair your computer. These tools can be burned to a CD or DVD or installed onto a USB drive. You can then restart your computer and boot from the removable media. A special antivirus environment will load where your computer can be scanned and repaired.

Incorrect Options:

A: Kill all system processes will stop system processes, and could have a negative effect on the system. It is not the BEST way to run the malware scanner

B: The basic purpose of a firewall is to isolate one network from another. It is not the BEST way to run the malware scanner.

D: Disabling the network connection will not allow for the BEST way to run the malware scanner.

Reference:

http://www.howtogeek.com/187037/how-to-scan-and-repair-a-badly-infected-computer-from­outside-windows/

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, p. 342