A user reports slow internet browsing.

High resource usage along with frequent pop-ups are strong signs of a malware infection. The next logical step is to update anti-malware definitions and run a full scan to detect and remove threats.

Option A: Network performance is likely not the root cause — local system behavior points to malware.

Option B: Drivers affect hardware functionality; they don’t resolve malware-related slowness.

Option D: DHCP issues usually cause IP conflicts or no network access, not CPU spikes or pop-ups.

CompTIA A+ Core 1 Exam Objective Reference:

Objective 4.2: Given a scenario, detect, remove, and prevent malware using appropriate tools and methods.