CompTIA A+ Core 2 (220-1102) — Question 562

A technician is troubleshooting a PC that will not run Windows Defender. Windows Defender has been disabled and no other antivirus is installed on the PC. Which of the following would have caused this issue?

Answer options

• A. Ransomware
• B. Rootkit
• C. Spyware
• D. Keylogger

Correct answer: B

Explanation

The correct answer is B, as a rootkit is designed to hide its presence and manipulate system functions, which can prevent Windows Defender from running. Ransomware, spyware, and keyloggers can also cause issues, but they don't typically disable antivirus software in the same way a rootkit does.