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

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.

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